The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
Wide17 was seeded with the "Total Domains" list of 256,796,456 URLs provided by Domains Indexon June 26th, and crawled with max-hops set to "3" and de-duplication set "on".
TIMESTAMPS
The Wayback Machine - https://web.archive.org/web/20190215113619/https://physicsworld.com/c/education-outreach/
Celebrating a Twitter project that links all the elements in the periodic table with anecdotes about their histories, uses and properties, in honour of the International Year of the Periodic Table
Interconnected graduate school allows hundreds of physics PhD students to access more than 800 hours of lectures across 50 advanced specialist physics courses