A detail from what is thought to be one of only three existing manuscripts containing Einstein's most famous formula about the relationship between energy, mass and the speed of light — in his handwriting.
March 19, 2012 They include work related to his most famous formula — E=mc² — and personal papers, such as letters to and from his former mistresses.
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March 14, 2012 The sky this month is filled with wonders. A few centuries ago, people would be panicking, thinking the end was near. Now, we have reason to celebrate.
A 2010 light installation entitled 'Speed of Light' in London.
Ben Stansall /AFP/Getty Images
November 18, 2011 Scientists in Italy say they've got more evidence. If so, it challenges Einstein's theory of relativity.
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