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explainthatstuff.com

Category: Education

Scanned: May 1, 2026, 01:49 AM UTC · First seen: May 1, 2026 · Threat Engines: 0 / 91 · Times Scanned: 1
90 / 100 Trust Score Based on scan findings at the time of analysis
No Threats Found
0 - High Risk50 - Moderate100 - No Threats
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Last scanned 11 days ago - security status may have changed since then.
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Screenshot of explainthatstuff.com Captured May 1, 2026
https://explainthatstuff.com
Screenshot of explainthatstuff.com
20 years
Popular - #57,226 Tranco rank (>1M monthly visitors)
Not listed (91 checked)
✓ Valid (TLS)
Scala Hosting LLC
Hawthorne, United States
Apache
Php/8.4.20
209.142.64.143
Domain & WHOIS Information
Registrar Tucows Domains Inc.
Registered April 22, 2006
Expires April 22, 2027
Name Servers NS0.ZEN.CO.UK
DNSSEC Unsigned
Hosting Scala Hosting LLC
Reputation & Threat Check 91 security engines checked
File Scan Summary Powered by Quttera Engine
101 files scanned
No threats
98
Low Risk
0
Medium Risk
3
High Risk
0
No threats Low Risk Medium Risk High Risk
www.explainthatstuff.com/history-of-communication.html 90.9 KB Flagged: medium risk
www.explainthatstuff.com/mybooks.php 48.6 KB Flagged: medium risk
www.explainthatstuff.com/electriccars.html 105.2 KB Flagged: medium risk
www.explainthatstuff.com.http-redirect 100 B No threats
www.explainthatstuff.com/telephone.html 78.0 KB No threats
www.explainthatstuff.com/rfid.html 67.3 KB No threats
www.explainthatstuff.com/cloud-computing-introduction.html 95.5 KB No threats
www.explainthatstuff.com/how-film-cameras-work.html 76.7 KB No threats
www.explainthatstuff.com/cellphones.html 79.7 KB No threats
www.explainthatstuff.com/headphones.html 70.5 KB No threats
www.explainthatstuff.com/walkie-talkies.html 57.6 KB No threats
www.explainthatstuff.com/quantum-computing.html 86.5 KB No threats
www.explainthatstuff.com/electricity.html 82.3 KB No threats
Show 88 more...
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External Links & Domains
4322
External Links
4 Flagged
69
Iframes
Clean
597
Referenced Domains
6 Flagged
10
Flagged Resources
Detected
blog.sciencemuseum.org.ukFlagged: Generic Suspicious Object
oxfordquantum.orgFlagged: Generic Malicious Object
www.autospeed.comFlagged: Generic Suspicious Object
www.creative-science.org.ukFlagged: Generic Suspicious Object
www.hive.co.ukFlagged: Generic Suspicious Object
www.mann-ivanov-ferber.ruFlagged: Generic Suspicious Object
http://www.autospeed.com/cms/article.html?&A%3D112925Flagged: Generic Suspicious Object
http://www.mann-ivanov-ferber.ru/books/atomyi-u-nas-doma/Flagged: Generic Suspicious Object
https://blog.sciencemuseum.org.uk/revealing-the-real-cooke-and-wheatstone-telegraph-dial/Flagged: Generic Suspicious Object
https://www.hive.co.uk/Product/Chris-Woodford/Breathless--Why-Air-Pollution-Matters---and-How-it-Affects-You/25441183Flagged: Generic Suspicious Object
http://www.autospeed.com/cms/article.html?&A%3D112925Flagged: Generic Suspicious Object
http://www.mann-ivanov-ferber.ru/books/atomyi-u-nas-doma/Flagged: Generic Suspicious Object
https://blog.sciencemuseum.org.uk/revealing-the-real-cooke-and-wheatstone-telegraph-dial/Flagged: Generic Suspicious Object
https://www.hive.co.uk/Product/Chris-Woodford/Breathless--Why-Air-Pollution-Matters---and-How-it-Affects-You/25441183Flagged: Generic Suspicious Object
http://awstats.sourceforge.net/Not flagged
http://berkeleyearth.org/Not flagged
http://bizarrelabs.com/phono.htmNot flagged
http://blog.physicsworld.com/2015/12/03/top-physics-books-of-2015/Not flagged
http://books.google.com/books?id%3D76uF2Xebm-gCNot flagged
http://books.google.com/books?id%3DMji4KPEqV3ACNot flagged
http://books.google.com/books?id%3Dfz0ymWEOyowC&lpg%3DPA60&lr&rview%3D1&pg%3DPA60#v%3Donepage&q&f%3DfalseNot flagged
http://books.google.com/books?id%3DoAAAAAAAMBAJ&lpg%3DPA38&dq%3Dground%20source%20heat%20pumps&pg%3DPA38#v%3Donepage&q%3Dground%20source%20heat%20pumps&f%3DfalseNot flagged
http://climatechange.medill.northwestern.edu/2016/11/29/artificial-trees-might-be-needed-to-offset-carbon-dioxide-emissions/Not flagged
http://content.time.com/time/specials/2007/article/0,28804,1663317_1663323_1669906,00.htmlNot flagged
http://creativecommons.org/Not flagged
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Showing first 500 of 4322 entries.
blog.sciencemuseum.org.ukFlagged: Generic Suspicious Object
oxfordquantum.orgFlagged: Generic Malicious Object
www.autospeed.comFlagged: Generic Suspicious Object
www.creative-science.org.ukFlagged: Generic Suspicious Object
www.hive.co.ukFlagged: Generic Suspicious Object
www.mann-ivanov-ferber.ruFlagged: Generic Suspicious Object
001.31.2.223Not flagged
10.1.1.424Not flagged
6thfloor.blogs.nytimes.comNot flagged
academic.oup.comNot flagged
acia.amap.noNot flagged
aerosocietyheritage.comNot flagged
afdc.energy.govNot flagged
agresearchmag.ars.usda.govNot flagged
ahf.nuclearmuseum.orgNot flagged
Show 485 more...
Showing first 500 of 597 entries.
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explainthatstuff.com Overview

Description of explainthatstuff.com

Explainthatstuff.com appears to be an educational science and technology website focused on explaining how everyday devices, engineering concepts, and scientific ideas work in plain language. The homepage presents it as a free online book with hundreds of illustrated articles aimed at families, students, and general readers, covering topics such as electronics, computing, energy, and mechanics.

Based on the page content and metadata, the site appears to be operated as a long-running personal or editorial educational project associated with science writer Chris Woodford. The navigation structure, article archive, teaching guide, and privacy pages suggest a content-driven reference site rather than a commercial storefront or user-generated platform.

The domain has been registered for about 20 years, which is consistent with an established informational resource. Its moderate web popularity ranking and extensive archive of external references also fit the profile of a mature educational publication that has accumulated many citations and outbound links over time.

Safety Assessment for explainthatstuff.com

The available scan data is generally favorable. At the time of this scan, 0 out of 91 security engines flagged the domain, and the domain was not listed by the checked blacklist databases. The domain age of roughly 20 years, along with a solid trust score and established traffic ranking, may reduce the likelihood that this is a newly created abusive site.

One malware scan did mark the overall site as suspicious and flagged 3 out of 101 scanned files, but the associated findings appear to be tied largely to outbound references on article pages rather than clear evidence of active malware hosted on the domain itself. Several referenced external domains and links were labeled as suspicious or malicious by that scan, which may reflect stale outbound citations, reputation issues on third-party sites, or heuristic false positives in a large educational archive with thousands of links.

Given the clean results from broad security-engine checks and blacklist lookups, the suspicious findings appear limited and somewhat contextual rather than conclusive. Based on available data, no significant threats were detected at the time of this scan, though visitors should still use normal caution when following older external links from archived articles.

Technical Description

The site uses a valid Let's Encrypt SSL/TLS certificate with expiry in late May 2026, indicating that HTTPS is enabled. It is hosted on an Apache web server at IP address 209.142.64.143 with hosting attributed to Scala Hosting LLC in the United States. The domain uses Zen Internet nameservers and has been registered through Tucows for many years.

DNSSEC appears to be unsigned, which is not uncommon but does mean DNS responses may lack an additional layer of authenticity protection. No major infrastructure-level issues are evident from the provided data. The main technical concern at the time of this scan is the presence of numerous outbound links, a small subset of which were heuristically flagged by a malware scanner, so caution may be warranted when navigating to older third-party references.

HTTP Redirect Chain
301 https://explainthatstuff.com
301 http://www.explainthatstuff.com/
200 https://www.explainthatstuff.com/
Website Insights
#57,226
Tranco Rank
Popular
Visitors >1M/mo
Category: Education
Rank History (30 days)
Mar 23 Apr 30
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This report was generated automatically and is provided for informational purposes only. Results are based on a point-in-time scan and may contain false positives or incomplete data. This does not constitute a security audit or certification. No vendor in the market can guarantee a 100% detection rate. If you believe this report is inaccurate, please submit a dispute.

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