Why the British Antarctic science base is being temporarily abandoned. New cracks have appeared in the Ice shelf on which the Halley research station sits.
The promise of viro-therapy for treating cancer. Scientists have successfully used a virus to kill cancer cells. They say this could form the basis for a vaccine that could be injected to destroy tumours.
The limitations of mouse models. Many animals are used for testing treatments intended for humans, we explain why the results of such experiments can't always be applied to people.
Measuring wind speeds from space. A new satellite will lead to more accurate weather forecasts.
Gene Cernan, the last man on the moon. We celebrate the charismatic astronaut who has died aged 82.