In the science news this week: NASA confirms there is water on Mars, a hidden Van Gogh portrait is revealed, and scientists turn water into rocket fuel. Plus, bumblebees help fight crime...

In the science news this week: drumming through a rock concert is as tiring as playing a Premier League football game, the Sahara desert could be the key to clean electricity, and scientists discover the cause of magnetic substorms in space. Plus, Lonesome George, the rarest creature on Earth may become a father...

In the science news this week: a genetic link is found to the African HIV epidemic, evidence water was 'widespread' on early Mars, and infectious cancer alters the mating behaviour of Tasmanian Devils. Plus, grunting fish tell us about our ability to speak...

In the science news this week: a bleak outlook for coral reefs, a method for determining the plumage colour of birds around at the time of dinosaurs and how bright bugs could lead the way to new drugs. Plus, a Rubik's Cube challenge for octopuses...