Protecting the Oceans

Chris Berrow and the Naked Scientist team present the week's science news. In today’s programme we look at the heatwaves sweeping across Europe; how babies in the womb use a “greedy” gene to get more food from mum; and why do tennis players take so long to choose a ball to serve with?

Plus we look at some of the ways scientists are trying to protect our planet’s oceans.