lasers – BTW – Stuff You Should Know

America gains a famous citizen / photo by Al. Aumuller. New York World-Telegram and the Sun Newspaper Photograph Collection, Library of Congress, LC-DIG-ppmsca-05649. MHE World.

Gravitational Wave Discovery: 100 Years in the Making

February 17, 2016 btwuser 0

Perhaps you’ve heard news about the discovery of “gravitational waves?” About how a team of scientists discovered the sound of two black holes colliding a billion […]