Roland Pease on the idea that life on early Earth led to the evolution of plate tectonics.
Gaia Vince asks if we can ever run our vehicles on biofuels from algae or bacteria.
Can we beat bacteria by stopping the bugs from talking to each other?
Roland Pease reports on scientists building brains from scratch in the lab.
Rebecca Morelle explores how the forensic science of speech is helping to solve crime.
Adam Rutherford reports on the recent discovery that much of our DNA is not useless junk.
Geoff Watts looks into how scientists can use the mind to control artificial limbs.
Has humanity launched a new geological time period? Gaia Vince on the Anthropocene Epoch.
Dr Yan Wong explores new theories on gender and ageing.
Tracey Logan asks what particle physicists are doing after finding the Higgs boson.