Virologist Thomas Geisbert has spent decades studying Ebola and other hemorrhagic fevers. He speaks to Audie Cornish about the current Ebola outbreak, the worst in history, and how it might be contained this time around.
The Natural Trap Cave in Wyoming may hold specimens of DNA from animals who roamed thousands of years ago. Julie Meachem, a paleontologist leading the expedition into the cave, speaks with Audie Cornish about the secrets she hopes to find.
The Obama administration is slapping stronger sanctions on Russia. The sanctions — which target key sectors of the Russian economy, including finance and defense — come as a response to Moscow's alleged involvement in Ukraine. The move comes on the same day that the European Union announced sanctions of its own.