Researchers rethink life in a cold climate after Antarctic find

Sponges and other animals have been discovered on a boulder under 900 metres of ice and 500 metres of water in Antarctica. The creatures were spotted by chance by an underwater camera, after researchers drilled through the Filchner-Ronne ice shelf to obtain a sediment core from the sea bed. No sunlight reaches the animals, and they are thought to live on food carried hundreds of kilometres from the nearest light.