The Big Bang Theory, one of the most popular sitcoms of the last decade, experienced a significant cast change that altered ...

Unlike his Big Bang Theory costars, Johnny Galecki has mostly stopped acting since the sitcom wrapped. Here's what he's been ...

The Harvard dropout revolutionized the computer industry and, later, the world of philanthropy. Now he has been looking back at his childhood, with the first of a three-part autobiography fittingly ...

The white monster might show up anywhere in the cosmos, so we'll have to wait 100 quatrillion years. White holes, reversed black holes in nature.

After decades of study, scientists sound genuinely optimistic about the possibility of detecting primordial black holes, which might explain dark matter.