Ancient Mars bacteria, and 'fugitive' methane leaks

In this edition of The Naked Scientists, the strongest hint yet of life on Mars. Should we get excited? Or is it another red herring? Also ahead: The first new UK-wide study of babies in 25 years. We'll find out why it matters. Plus, an ancient lizard-like fossil is discovered on the coast of Devon. We'll uncover the significance... Like this podcast? Please help us by supporting the Naked Scientists