We're discussing the science of kissing with Sheril Kirshenbaum, author of the new book "The Science of Kissing: What Our Lips Are Telling Us." Kirshenbaum recently spoke with the The World's science correspondent, Rhitu Chatterjee.
In a new book, journalist Fred Pearce argues population growth is not a problem and that focusing on it is distracting people from the earth's real ills. Rhitu Chatterjee spoke to Pearce and brings some clips to the show.
Scientists trying to protect the endangered Sumatran orangutan have adopted an unusual tool for their work: Drones. These unmanned aerial vehicles are a quick and inexpensive way to monitor orangutans and their habitat.
Noc was a beluga whale that spent most of its life at a naval research facility in San Diego. Scientists studying Noc say he imitated human sounds. They have published Noc's human-like sounds in a new study in the journal Current Biology.
As Americans hit the malls this Friday, we asked some folks around the globe about the equivalent to Black Friday in their country. What we found is a many similarities, but not many places that do it quite the American way.