The Mortal Wombat

Astronomers are gathering in the Czech capital, Prague, hoping to define exactly what counts as a planet. The International Astronomical Union (IAU) hopes to settle the question of Pluto, which was first spotted in 1930.

Babies appear to be puzzled by puppet weirdness.

US researchers have reconstructed a mouse gene from 500 million years ago.

Penguins stranded on the beaches of Rio de Janeiro will hitch a ride back home to Antarctica with Brazil's air force and navy.