In the science news this week, Stephen Hawking turns 70, how carbon emissions will put off the next ice age, why life could have started without DNA, and finally... a new species of hairy-chested crab is dubbed the Hoff crab.

In the science news this week, a mission to explore an underground lake, scientists discover an unsavoury taste in our mouths, the truth behind internet addiction, and finally... Phobos-Grunt plunged into the Pacific after all.

In the science news this week, how quantum computing could make the 'cloud' more secure, why there is concern about Britain's waterways, a new exhibition about Captain Scott opens, and finally... why scratching your ankle is so satisfying.

In the science news this week, pythons are destroying the mammal population in Florida, scientists create brain cells from skin samples, smells trigger the most powerful memories, and finally... finding objects right in front of you could be hindered by out of sync brains.