Privacy Policy
Last updated: June 2026
At 4 Billion Years On, accessible from 4billionyearson.org, your privacy matters to us. This policy explains what information we collect, how we use it, and what we do not do with it.
What we collect and why
We do not collect any personally identifiable information unless you contact us directly by email. We do not run advertising networks, sell data, or use tracking pixels.
Like all hosted websites, our servers automatically record standard log data when you visit - including your IP address, browser type, referring page, and the date and time of your request. This information is used solely for security monitoring and diagnosing technical issues. It is not linked to any personal identity and is not retained beyond routine server log rotation.
Cookies
We use a small number of cookies to make the site work correctly - for example, to remember your preferences. We do not use cookies for advertising or cross-site tracking. You can disable cookies in your browser settings at any time, though some parts of the site may not function as intended if you do.
Analytics
This website uses Google Analytics and Vercel Analytics to collect anonymous usage data - including page views, session duration, and general geographic location (country or region level). This helps us understand how the site is used and where we can improve it. No personally identifiable information is collected through these services.
You can opt out of Google Analytics tracking by installing the Google Analytics Opt-out Browser Add-on.
Third-party data sources
Our dashboards and trackers across Climate, AI, Energy, and Biotech pull data from a range of public scientific APIs and databases. These requests are made server-side - no information about you is passed to those services when you view our pages. A full list of sources and methodologies is published on our Methodology & Sources page.
To improve performance, data responses are temporarily cached using Upstash Redis. This cache holds only the data displayed on the site and contains no user or visitor information.
Third-party links
Our site contains links to external websites - including data sources, book retailers, and reference material. Once you leave 4billionyearson.org, this privacy policy no longer applies. We encourage you to review the privacy policies of any external sites you visit.
Contact
If you have any questions about this policy or how your data is handled, please get in touch at chris.4billionyearson@gmail.com.