Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
app.termly.io/resource-blocker/67c19541-575a-4f7b-9bc1-f00a61fc020c	14400.0 s	143.3 KiB
pianocdn.thebulletin.org/api/tinypass.min.js	14400.0 s	132.7 KiB
connect.facebook.net/en_US/fbevents.js	1200.0 s	96.6 KiB
/signals/config/195699461699376?v=2.9.303&r=stable&domain...	1200.0 s	47.1 KiB
i.ytimg.com/vi_webp/s7lo1St5ruI/sddefault.webp	7200.0 s	10.8 KiB
snap.licdn.com/li.lms-analytics/insight.min.js	86400.0 s	18.7 KiB
diffuser-cdn.app-us1.com/diffuser/diffuser.js	300.0 s	7.7 KiB
app.termly.io/resource-blocker/support/894-6156b36a131577c56e7e.min.js	14400.0 s	8.4 KiB
app.termly.io/resource-blocker/support/808-26e9c6c7a3bd048ed656.min.js	14400.0 s	3.2 KiB
app.termly.io/resource-blocker/support/524-7d36cb122791702e3df2.min.js	14400.0 s	2.7 KiB
www.npttech.com/advertising.js	28800.0 s	3.1 KiB
app.termly.io/resource-blocker/support/377-e518d8a5c599aa1c5977.min.js	14400.0 s	873 B
/v/t39.30808-1/515504936_1138004331697129_712887676306434...	1209600.0 s	4.7 KiB
static.doubleclick.net/instream/ad_status.js	900.0 s	494 B
/collect?v=2&fmt=js&pid=6981098&time=1776896368583&li_ads...	0.0 ms	272 B
/tr/?id=195699461699376&ev=PageView&dl=https%3A%2F%2Ftheb...	0.0 ms	16 B

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:106.699 source:map[type:text value:[unattributed]]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
python cave `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	thebulletin.org/wp-content/uploads/2026/04/python-cave-410x230.png	180.0 KiB	164.7 KiB
div.fl-module > div#thebu-3977847494 > a.a2t-link > img `div.fl-module > div#thebu-3977847494 > a.a2t-link > img`	/wp-content/uploads/2026/04/Apr.-2026-Fundraising-2-—-H...	197.7 KiB	160.3 KiB
View of Times Square in New York with a white balloon displaying "Zero Nukes" `div.fl-module > div.fl-module-content > div.uabb-module-content > img.uabb-ultb3-img`	thebulletin.org/wp-content/uploads/2025/10/art-science-initiative-banner-800.png	175.0 KiB	150.6 KiB
People sit around a roundtable in a conference room with screens in the middle `div.fl-module > div.fl-module-content > div.uabb-module-content > img.uabb-ultb3-img`	thebulletin.org/wp-content/uploads/2025/10/pathogens-project-banner-800.png	129.2 KiB	104.8 KiB
Golden Dome in action `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/Strategic-Ballistic-Missile-D...	114.1 KiB	98.7 KiB
Man in athletic attire with Bulletin of the Atomic Scientists printed on back o… `div.fl-module > div.fl-module-content > div.uabb-module-content > img.uabb-ultb3-img`	/wp-content/uploads/2025/10/next-generation-initiative-ba...	114.4 KiB	90.1 KiB
div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	thebulletin.org/wp-content/uploads/2026/04/mesaverde2_29Jan2026-410x230.webp	59.1 KiB	43.8 KiB
Satellite view of a tunnel entrance with a blue truck, several smaller vehicles… `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/03/2025-06-09_32.585667-51.81476...	47.2 KiB	38.3 KiB
Chris Wright and Donald Trump, center `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	thebulletin.org/wp-content/uploads/2026/03/P20251006JB-0286-410x230.webp	24.3 KiB	15.4 KiB
div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/Forest_Service_hosts_Old_Grow...	26.9 KiB	11.6 KiB
div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/03/26041305772277-crop-410x230.j...	18.8 KiB	9.9 KiB
div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/20260326_EP-201941C_AR1_0699-...	21.9 KiB	6.5 KiB
John Kerry with granddaughter signing Paris climate agreement `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/Secretary_Kerry_Holds_Grandda...	21.6 KiB	6.2 KiB
Three drones flying in a pink and orange sky `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/03/Depositphotos_690917922_XL-41...	13.5 KiB	5.7 KiB
Three men in suits stand in front of two US flags; one speaks at a podium with … `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/GettyImages-2270432153-410x23...	20.6 KiB	5.2 KiB
div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/v/t39.30808-1/515504936_1138004331697129_712887676306434...	4.7 KiB	4.0 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-7-IMG

nodeLabel: Satellite view of a tunnel entrance with a blue truck, several smaller vehicles…

path: 1,HTML,1,BODY,10,DIV,0,DIV,0,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,A,0,IMG

selector: div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img

snippet: <img decoding="async" src="https://thebulletin.org/wp-content/uploads/2026/03/2025-06-09_32.585667-51…" alt="Satellite view of a tunnel entrance with a blue truck, several smaller veh…">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
app.termly.io/resource-blocker/67c19541-575a-4f7b-9bc1-f00a61fc020c	143.3 KiB	6.0 s
/wp-content/themes/atomic-bulletin/dist/js/main-js.js?ver...	24.0 KiB	152 ms
thebulletin.org/wp-includes/js/utils.min.js?ver=6.9.4	971 B
/wp-content/plugins/featured-video-plus/js/jquery.fitvids...	863 B
/wp-content/plugins/featured-video-plus/js/frontend.min.j...	1.2 KiB
thebulletin.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1	4.8 KiB
thebulletin.org/wp-includes/js/clipboard.min.js?ver=2.0.11	3.1 KiB
thebulletin.org/wp-includes/css/dashicons.min.css?ver=6.9.4	34.5 KiB	1.2 s
/wp-content/themes/atomic-bulletin/dist/css/main-styles.c...	24.4 KiB	1.4 s
/wp-content/plugins/advanced-ads-slider/public/assets/css...	591 B	152 ms
/wp-content/plugins/advanced-ads-slider/public/assets/css...	467 B
/wp-content/uploads/bb-plugin/cache/10064-layout.css?ver=...	14.9 KiB	455 ms
/wp-content/plugins/wp-views/public/css/views-frontend.cs...	3.4 KiB
thebulletin.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1	29.1 KiB	455 ms
thebulletin.org/wp-includes/js/mediaelement/wp-mediaelement.min.css?ver=6.9.4	1.2 KiB
thebulletin.org/wp-content/plugins/wp-pagenavi/pagenavi-css.css?ver=2.70	411 B
/wp-includes/js/mediaelement/mediaelementplayer-legacy.mi...	2.6 KiB	152 ms
/wp-content/plugins/advanced-ads/assets/dist/advanced.js?...	2.6 KiB	152 ms
/wp-content/plugins/featured-video-plus/styles/frontend.c...	754 B
/wp-content/plugins/wp-views/vendor/toolset/common-es/pub...	1.8 KiB

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Est Savings
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2	5.0 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 150 ms 16.6 KiB

URL	Transfer Size	Est Savings
/wp-content/plugins/advanced-ads-pro/assets/js/postscribe...	12.4 KiB	6.4 KiB
/wp-content/themes/atomic-bulletin/resources/bb-ultimate-...	13.0 KiB	5.1 KiB
/wp-content/plugins/advanced-ads-layer/public/assets/js/l...	6.6 KiB	2.8 KiB
thebulletin.org/wp-content/plugins/megamenu/js/maxmegamenu.js?ver=3.8.1	6.1 KiB	2.3 KiB

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 450 ms 68.7 KiB

URL	Transfer Size	Est Savings
thebulletin.org/wp-includes/css/dashicons.min.css?ver=6.9.4	34.3 KiB	34.3 KiB
/wp-content/themes/atomic-bulletin/dist/css/main-styles.c...	24.1 KiB	22.5 KiB
@charset "UTF-8";/** THIS FILE IS AUTOMATICALLY GENERATED...	11.9 KiB	11.9 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.4 s 347.9 KiB

URL	Transfer Size	Est Savings
pianocdn.thebulletin.org/api/tinypass.min.js	132.1 KiB	82.0 KiB
www.googletagmanager.com/gtag/js?id=G-4G39WYQ1DT&cx=c&gtm=4e64k1	172.5 KiB	66.0 KiB
www.googletagmanager.com/gtm.js?id=GTM-KCT2D8H	165.8 KiB	62.2 KiB
www.googletagmanager.com/gtag/js?id=AW-770325023&cx=c&gtm=4e64k1	137.3 KiB	53.3 KiB
app.termly.io/resource-blocker/67c19541-575a-4f7b-9bc1-f00a61fc020c	143.1 KiB	52.9 KiB
connect.facebook.net/en_US/fbevents.js	96.5 KiB	31.5 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
thebulletin.org/	1.3 s	238 ms	38 ms
Unattributable	917 ms	47 ms	0.0 ms
www.googletagmanager.com/gtm.js?id=GTM-KCT2D8H	594 ms	483 ms	72 ms
app.termly.io/resource-blocker/67c19541-575a-4f7b-9bc1-f00a61fc020c	473 ms	384 ms	56 ms
www.googletagmanager.com/gtag/js?id=AW-770325023&cx=c&gtm=4e64k1	471 ms	412 ms	52 ms
www.googletagmanager.com/gtag/js?id=G-4G39WYQ1DT&cx=c&gtm=4e64k1	432 ms	359 ms	69 ms
pianocdn.thebulletin.org/api/tinypass.min.js	373 ms	198 ms	57 ms
js-agent.newrelic.com/nr-spa-1.313.1.min.js	267 ms	233 ms	13 ms
thebulletin.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1	253 ms	195 ms	12 ms
/signals/config/195699461699376?v=2.9.303&r=stable&domain...	211 ms	169 ms	38 ms
connect.facebook.net/en_US/fbevents.js	197 ms	129 ms	67 ms
/id/api/v1/identity/token/verify?browser_id=moam7whgp8kqn...	130 ms	118 ms	0.4 ms
snap.licdn.com/li.lms-analytics/insight.min.js	80 ms	58 ms	21 ms
thebulletin.org/wp-includes/js/wp-emoji-release.min.js?ver=6.9.4	68 ms	64 ms	3.3 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	3.4 s
Other	948 ms
Style & Layout	932 ms
Script Parsing & Compilation	598 ms
Parse HTML & CSS	207 ms
Garbage Collection	141 ms
Rendering	36 ms

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
www.youtube.com/s/player/1bb6ee63/player_embed_es6.vflset/en_US/base.js	436.0 KiB
/s/_/ytembeds/_/js/k=ytembeds.base.en_US.5f0apfZzpOA.2021...	317.0 KiB
/wp-content/uploads/2026/04/Apr.-2026-Fundraising-2-—-H...	198.2 KiB
thebulletin.org/wp-content/uploads/2026/04/python-cave-410x230.png	180.5 KiB
thebulletin.org/wp-content/uploads/2025/10/art-science-initiative-banner-800.png	175.5 KiB
www.googletagmanager.com/gtag/js?id=G-4G39WYQ1DT&cx=c&gtm=4e64k1	172.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-KCT2D8H	166.2 KiB
app.termly.io/resource-blocker/67c19541-575a-4f7b-9bc1-f00a61fc020c	143.3 KiB
www.googletagmanager.com/gtag/js?id=AW-770325023&cx=c&gtm=4e64k1	137.4 KiB
pianocdn.thebulletin.org/api/tinypass.min.js	132.7 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
Satellite view of a tunnel entrance with a blue truck, several smaller vehicles… `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/03/2025-06-09_32.585667-51.81476...
Golden Dome in action `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/Strategic-Ballistic-Missile-D...
John Kerry with granddaughter signing Paris climate agreement `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/Secretary_Kerry_Holds_Grandda...
div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/20260326_EP-201941C_AR1_0699-...
div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	thebulletin.org/wp-content/uploads/2026/04/mesaverde2_29Jan2026-410x230.webp
A group of people in formal attire sit around a table with phones and documents… `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/02/Trump-Operation-Epic-Fury-Mar...
Three men in suits stand in front of two US flags; one speaks at a podium with … `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/GettyImages-2270432153-410x23...
div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/Forest_Service_hosts_Old_Grow...
python cave `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	thebulletin.org/wp-content/uploads/2026/04/python-cave-410x230.png
A bright rocket streaks upward into the night sky from a snowy, mountainous coa… `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/02/Black-Brant-XII-launch-Andoya...
Sunoco gas station lit up at night `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/1280px-thumbnail-410x230.jpg....
Chris Wright and Donald Trump, center `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	thebulletin.org/wp-content/uploads/2026/03/P20251006JB-0286-410x230.webp
Three drones flying in a pink and orange sky `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/03/Depositphotos_690917922_XL-41...
Reagan and Gorbachev `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/03/BUR8511_ReaganGorbachev-410x2...
div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/03/26041305772277-crop-410x230.j...
div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/pexels-gustavo-fring-6870412-...
Ethan Beaty headshot with text: Ethan Beaty wins the 2025 Rieser Award `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	thebulletin.org/wp-content/uploads/2026/03/rieser-award-gray-grey-410x230.png
Alexandra Bell moves the hand of the Doomsday Clock `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/01/Featured-Image-410x230.jpg.op...

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits

●Document request latency

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●User Timing marks and measures 12 user timings

●Avoid long main-thread tasks 20 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 20 ms

●Server Backend Latencies 90 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 30 ms

○INP breakdown

○Avoid non-composited animations

○Avoid large layout shifts

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Doomsday Clock Statement `div.menu-footer-menu-doomsday-clock-container > ul#menu-footer-menu-doomsday-clock > li#menu-item-22387 > a`
The Clock Setters `div.menu-footer-menu-doomsday-clock-container > ul#menu-footer-menu-doomsday-clock > li#menu-item-119003 > a`
Timeline `div.menu-footer-menu-doomsday-clock-container > ul#menu-footer-menu-doomsday-clock > li#menu-item-22260 > a`
FAQ `div.menu-footer-menu-doomsday-clock-container > ul#menu-footer-menu-doomsday-clock > li#menu-item-10810 > a`
Virtual Tour `div.menu-footer-menu-doomsday-clock-container > ul#menu-footer-menu-doomsday-clock > li#menu-item-121746 > a`
Doomsday Clock Playlist `div.menu-footer-menu-doomsday-clock-container > ul#menu-footer-menu-doomsday-clock > li#menu-item-93781 > a`
Nuclear Risk `div.menu-footer-menu-featured-topics-container > ul#menu-footer-menu-featured-topics > li#menu-item-10146 > a`
Climate Change `div.menu-footer-menu-featured-topics-container > ul#menu-footer-menu-featured-topics > li#menu-item-10147 > a`
Disruptive Technologies `div.menu-footer-menu-featured-topics-container > ul#menu-footer-menu-featured-topics > li#menu-item-10148 > a`
Biosecurity `div.menu-footer-menu-featured-topics-container > ul#menu-footer-menu-featured-topics > li#menu-item-121748 > a`
Nuclear Notebook `div.menu-footer-menu-featured-topics-container > ul#menu-footer-menu-featured-topics > li#menu-item-121749 > a`
What’s new at the Bulletin `div.menu-footer-menu-featured-topics-container > ul#menu-footer-menu-featured-topics > li#menu-item-121750 > a`
Bulletin `ul#menu-footer-menu-featured-topics > li#menu-item-121750 > a > em`
Login `div.menu-footer-menu-magazine-container > ul#menu-footer-menu-magazine > li#menu-item-121756 > a`
Current Magazine Issue `div.menu-footer-menu-magazine-container > ul#menu-footer-menu-magazine > li#menu-item-121752 > a`
Subscribe to the Magazine `div.menu-footer-menu-magazine-container > ul#menu-footer-menu-magazine > li#menu-item-121753 > a`
My Account `div.menu-footer-menu-magazine-container > ul#menu-footer-menu-magazine > li#menu-item-121751 > a`
Magazine Archive `div.menu-footer-menu-magazine-container > ul#menu-footer-menu-magazine > li#menu-item-121755 > a`
Magazine FAQ `div.menu-footer-menu-magazine-container > ul#menu-footer-menu-magazine > li#menu-item-121754 > a`
Magazine Covers `div.menu-footer-menu-magazine-container > ul#menu-footer-menu-magazine > li#menu-item-92105 > a`
Ways To Give `div.menu-footer-menu-support-our-work-container > ul#menu-footer-menu-support-our-work > li#menu-item-128167 > a`
Give Now `div.menu-footer-menu-support-our-work-container > ul#menu-footer-menu-support-our-work > li#menu-item-128132 > a`
What Your Gift Supports `div.menu-footer-menu-support-our-work-container > ul#menu-footer-menu-support-our-work > li#menu-item-128137 > a`
Annual Event `div.menu-footer-menu-support-our-work-container > ul#menu-footer-menu-support-our-work > li#menu-item-126087 > a`
Einstein Circle `div.menu-footer-menu-support-our-work-container > ul#menu-footer-menu-support-our-work > li#menu-item-128136 > a`
Legacy Society `div.menu-footer-menu-support-our-work-container > ul#menu-footer-menu-support-our-work > li#menu-item-128135 > a`
Donor-Advised Fund `div.menu-footer-menu-support-our-work-container > ul#menu-footer-menu-support-our-work > li#menu-item-128134 > a`
Store `div.menu-footer-menu-support-our-work-container > ul#menu-footer-menu-support-our-work > li#menu-item-75156 > a`
Our Mission `div.menu-footer-menu-about-container > ul#menu-footer-menu-about > li#menu-item-10397 > a`
Leadership `div.menu-footer-menu-about-container > ul#menu-footer-menu-about > li#menu-item-10408 > a`
Staff `div.menu-footer-menu-about-container > ul#menu-footer-menu-about > li#menu-item-10398 > a`
Events `div.menu-footer-menu-about-container > ul#menu-footer-menu-about > li#menu-item-121741 > a`
Editorial Independence Policy `div.menu-footer-menu-about-container > ul#menu-footer-menu-about > li#menu-item-10402 > a`
Annual Report `div.menu-footer-menu-about-container > ul#menu-footer-menu-about > li#menu-item-10399 > a`
Pathogens Project `div.menu-footer-menu-about-container > ul#menu-footer-menu-about > li#menu-item-121744 > a`
Arts + Science Initiative `div.menu-footer-menu-about-container > ul#menu-footer-menu-about > li#menu-item-121740 > a`
Next Generation Initiative `div.menu-footer-menu-about-container > ul#menu-footer-menu-about > li#menu-item-121742 > a`
Open Positions `div.menu-footer-menu-about-container > ul#menu-footer-menu-about > li#menu-item-92713 > a`
Send us a Tip `div.menu-footer-menu-contact-us-container > ul#menu-footer-menu-contact-us > li#menu-item-121745 > a`
Write for Us `div.menu-footer-menu-contact-us-container > ul#menu-footer-menu-contact-us > li#menu-item-10406 > a`
Permissions & Copyrights `div.menu-footer-menu-contact-us-container > ul#menu-footer-menu-contact-us > li#menu-item-10407 > a`
Media Inquiries `div.menu-footer-menu-contact-us-container > ul#menu-footer-menu-contact-us > li#menu-item-22264 > a`
Support Us `div.menu-footer-menu-contact-us-container > ul#menu-footer-menu-contact-us > li#menu-item-55590 > a`
Advertise `div.menu-footer-menu-contact-us-container > ul#menu-footer-menu-contact-us > li#menu-item-74923 > a`
Email Us `div.menu-footer-menu-contact-us-container > ul#menu-footer-menu-contact-us > li#menu-item-85247 > a`
Get Our Newsletter `div.menu-footer-menu-stay-connected-container > ul#menu-footer-menu-stay-connected > li#menu-item-60041 > a`
Email Courses `div.menu-footer-menu-stay-connected-container > ul#menu-footer-menu-stay-connected > li#menu-item-126290 > a`
Facebook `div.menu-footer-menu-stay-connected-container > ul#menu-footer-menu-stay-connected > li#menu-item-10409 > a`
Bluesky `div.menu-footer-menu-stay-connected-container > ul#menu-footer-menu-stay-connected > li#menu-item-118020 > a`
LinkedIn `div.menu-footer-menu-stay-connected-container > ul#menu-footer-menu-stay-connected > li#menu-item-10412 > a`
YouTube `div.menu-footer-menu-stay-connected-container > ul#menu-footer-menu-stay-connected > li#menu-item-118021 > a`
Instagram `div.menu-footer-menu-stay-connected-container > ul#menu-footer-menu-stay-connected > li#menu-item-10411 > a`
Twitter `div.menu-footer-menu-stay-connected-container > ul#menu-footer-menu-stay-connected > li#menu-item-10410 > a`

These are opportunities to improve the legibility of your content.

Names and labels

Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.fl-module > div.fl-module-content > div.fl-html > iframe `div.fl-module > div.fl-module-content > div.fl-html > iframe`

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
nav.navbar > div.content-nav > div.second-logo > a `nav.navbar > div.content-nav > div.second-logo > a`
div.fl-module-content > div.uabb-module-content > div.uabb-infobox-left-right-wrap > a.uabb-infobox-module-link `div.fl-module-content > div.uabb-module-content > div.uabb-infobox-left-right-wrap > a.uabb-infobox-module-link`
div.fl-module > div.fl-module-content > div.uabb-module-content > a.uabb-infobanner-module-link `div.fl-module > div.fl-module-content > div.uabb-module-content > a.uabb-infobanner-module-link`
div.fl-module > div.fl-module-content > div.uabb-module-content > a.uabb-infobanner-module-link `div.fl-module > div.fl-module-content > div.uabb-module-content > a.uabb-infobanner-module-link`
div.fl-module > div.fl-module-content > div.uabb-module-content > a.uabb-infobanner-module-link `div.fl-module > div.fl-module-content > div.uabb-module-content > a.uabb-infobanner-module-link`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●`button`, `link`, and `menuitem` elements have accessible names

●ARIA attributes are used as specified for the element's role

●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

●`[aria-hidden="true"]` elements do not contain focusable descendents

●Elements use only permitted ARIA attributes

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links are distinguishable without relying on color.

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○Form elements have associated labels

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Identical links have the same purpose.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

Best Practices

User Experience

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Displayed size	Actual size	Expected size
Golden Dome in action `div.uabb-blog-post-inner-wrap > div.uabb-post-thumbnail > a.over-link > img`	/wp-content/uploads/2026/04/Strategic-Ballistic-Missile-D...	372 x 209	410 x 230	558 x 314

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / Warning	Source
AttributionReporting	snap.licdn.com/li.lms-analytics/insight.min.js

●Uses HTTPS

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destination	Link Text
thebulletin.org/the-ai-power-trip/	READ MORE

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`