White Dwarf's Stellar Show

Watching explosions on the surface of a white dwarf star about 2,000 light years away that is on course to become a supernova. A tear in the Earth's crust opened by an earthquake in Ethiopia could be the geological birth of an ocean. Climate change and the desertification of prehistoric Egypt shaped the way ancient Egytians lived and traded. Plus, biofuel cars put through their paces at the British Motor Show.