Reporting in Science, researchers write that a red disk painted in Spain's El Castillo cave is at least 40,800 years old--making it the oldest known European cave art. Archaeologist Alistair Pike discusses how his team dated the disk, and whether Neanderthals could have painted it.
This is SCIENCE FRIDAY; I'm Ira Flatow. Imagine a cargo plane dropping you off in a remote corner of the African jungle. The area you've just entered is under quarantine for a mysterious plague. Nobody knows how many people it has killed, but all who have fallen sick die within eight days, first high fever, headache, hallucinations, then usually bleeding to death.
Mitt Romney referred to morning after-pills as 'abortive pills.' The FDA-approved label on Plan B indicates it may prevent fertilized eggs from implanting in a woman's uterus. Dr. Kristina Gemzell-Danielsson, an obstetrics and gynecology professor at Karolinska Institute, discusses the growing scientific evidence to the contrary.
There are trillions of germs that live on us. What are they? What do they do? Inquiring minds want to know, and so they set to find out. And after five years of research, a group of several hundred scientists has released a census of the bacteria, viruses, fungi, other microorganisms that call our bodies home.