Beavers build a much-needed dam that would have cost $1.2 million to make otherwise and how Omega 3 can slow your aging. Plus, on This Day in History, YouTube celebrates its 20th anniversary. We take a look back at the start of the company and where it is at today.

Beavers Built a $1.2M Dam for Free — And Saved a Czech River | ZME Science

This one supplement could slow your biological age | BBC Science Focus Magazine

YouTube turns 20! The numbers behind the platform - BBC Bitesize

February 14 marks the 20th anniversary of YouTube's founding - Tubefilter

YouTube Statistics: Revenue & Growth (2025)

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