Birds that travel widely can understand warning calls made by other bird species encountered during migrations, scientists say. Stay-at-home birds show no such ability.

Lebanon has launched a campaign to get its renowned Jeita Grotto caves named as one of the world's "New Seven Wonders of Nature."

Wig curlers, a pipe with Masonic carvings, and a half million other artifacts were also part of the discovery, which will help scholars fill in large gaps in the story of the first U.S. president's early life.

A litter of puppies, bred from dogs in Bosnia, are undergoing training to help sniff out unexploded munitions that litter the Cambodian countryside.

Many Bolivians feel that coca has been unfairly stigmatized in the country, where the plant has traditional medicinal uses and features in many everyday rituals.

Every year a Vermont researcher follows another of the state's residents to the Caribbean: the Bicknell thrush, a small migratory bird.

A beach full of red balloons, a new Argo setting sail, and a U.S. flag lit up by lightning are among this week's most colorful events.

Some environmentalists fear that the historic land deal could be seriously hampered unless the U.S. Congress follows through on a funding commitment it made almost 20 years ago.