What the Neanderthals did to (or for) us
Following up on the now-old news that modern humans carry some Neanderthal DNA, Tabitha M. Powledge explores some of the details. Females may have benefitted from the genome-mixing, she writes, and there are signs that our ability to speak did not come from the Neanderthals. Also, examining the widespread misinterpretations of the Congressional Budget Offices's new Obamacare report. And the frightening news from China about two new bird flu strains appearing in humans.