Bird Brains - Clues to the origins of human language are turning up in the brains of birds.Space Storms - Behind the dazzling display of the aurora borealis are space storms that could turn the lights off here on Earth.Profile: Yoky Matsuoka - A former tennis prodigy aims to create advanced prosthetic limbs controlled by human thought.Smart Bridges - Can we engineer bridges that tell us what's wrong with them before it's too late?