Biggest Scientific Breakthroughs of 2013

From intergalactic neutrinos and invisible brains, to the creation of miniature human "organoids," 2013 was a remarkable year for scientific discovery. Here are 17 of the biggest scientific breakthroughs, innovations and advances of 2013. » 12/20/13 10:49am 12/20/13 10:49am

This skull may have just rewritten the book on human evolution

It's a discovery that could change our understanding of early humans. An incredibly well-preserved, 1.8-million-year-old skull from Dmanisi, Georgia suggests the evolutionary tree of the genus Homo may have fewer branches than previously believed. » 10/17/13 6:18pm 10/17/13 6:18pm