In the news this week: scientists believe the North pole ice may disappear completely, why Mars is a two-faced planet, 'crocodile language' is translated and a new use for stink bomb gas is discovered.

In the news this week: cloned immune cells clear a patient's cancer, meteorites that could offer clues to the origins of life and the solar system, and the science of why we scream...

In the science news this week: stunning images both of the instant a star died and of the moment a human egg was released during ovulation, a 2,000-year-old seed has become the oldest ever grown successfully, and an early warning system could identify birds at risk of population decline. Plus, new research suggests humans should be let off the hook for hunting woolly mammoths to extinction...