Scientists presume to speak with confidence about the origin of the universe and billions of years, but have been clueless about some everyday things close to home in the present.
A well-preserved complete skull from Dmanisi, Georgia, has ignited a firestorm, threatening to declassify various claimed species of Homo into one, Homo erectus.
Scientists have not only made the production of induced pluripotent stem cells much more efficient, but also have made them just as capable as embryonic stem cells of being able to produce any cell type.