High-Speed Video Reveals The Source Of That Incredible After-Rain Smell

That smell has a name. It's called petrichor. For decades, scientists have speculated on where this smell comes from, but the mechanism behind the phenomenon has remained elusive. Now, researchers at MIT studying high-speed video of raindrops think they've found the answer: The smell is released in tiny aerosol clouds… » 1/15/15 5:30pm 1/15/15 5:30pm

From AIDS to Ebola, Why Is Global Health Security Failing?

Amid news that the number of Ebola cases had reached more than 6,000 in West Africa, public health and international security experts from around the world gathered in Washington, DC last week for a candid discussion of how the global community failed to contain the disease—and what lessons still needed to be learned. » 10/07/14 12:10pm 10/07/14 12:10pm