Health & Safety

Critics say the U.S. is one of the few industrialized nations not to offer any paid leave for new parents, but now the Washington, D.C., Council is considering a bill that would grant workers in the nation's capital 16 weeks of paid leave — more than anywhere else in the U.S.

Pauline Cafferkey, who caught the virus last winter in Sierra Leone, was taken to the hospital with an "unusual late complication" from her previous infection. That's a surprise — and a concern.

A big sticking point in the negotiations over the Trans-Pacific Partnership involved biologics medicines and vaccines created from living organisms. The dispute centered on patent protection: how many years drug companies should have before facing competition from generics. The negotiators ended up with a complicated compromise that gives drug makers five to eight years of protection. But nobody is really happy with the outcome.

Juan Enriquez argues that human evolution is far from over — Homo sapiens are becoming a new species right before our eyes.

Geneticist Spencer Wells tells the story of early humans, and our eventual migration from Africa.