Some 100 feet below the ocean's surface, Stephen Hawking peeked through the circular porthole of a submarine and saw the brilliant blue tropical water. It was March 2006, and the famous astrophysicist ...
Physicist Alan Guth of the Massachusetts Institute of Technology asks a question during a news conference at the Harvard-Smithsonian Center for Astrophysics in Cambridge, Mass., on March 17, 2014, ...
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