How will your vote affect the future prospects for science in the UK? And in the event of a hung parliament, will the parties' attitudes to science play any part in negotiations? Researcher Martin Robbins has been finding out in his Litmus Test series in which all the main political parties were challenged to answer some thorny questions about their science policies.
We also bring you ... battle of the apes! The Guardian's evolutionary agony aunt Carole Jahme uncovers the evolutionary roots of the party leaders' behaviour in the three televised debates.
In the newsjam we look at how chimpanzees cope with the death of other chimps; research that suggests asteroids may have helped start life on Earth; a truce between Susan Greenfield and the Royal Institution; and why there's good news for hot dog sellers near comedy venues.
Guardian science correspondent Ian Sample and The Observer's science and technology editor Robin McKie are in the studio.
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