Secrets of the Hive

Honeybees are in a crisis. Every year we lose about a third of these endangered creatures, which we rely on to pollinate most of the world's daily food. But as farmers face devastating losses, scientists are finding hope in the huge and barely tapped world of the 20,000 species of wild bees. These are the innovative methods and unusual experiments biologists are working on in their race to end this global calamity.