A bionic arm, frozen iguanas, the Cassini crash and growing lambs in bags.

In the first show of the new year, Hannah and Malcolm recap their favourite stories from last year.

We revisit the incubation premature lambs in fluid-filled bags and the crash of Cassini, have an interview with Seth Shostak about the search for extra terrestrial life, and hear news about the bomb cyclone's effect on iguanas.