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Science
LEADING EDGE
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Thursday 21:00-21:30
Leading Edge brings you the latest news from the world of science. Geoff Watts celebrates discoveries as soon as they're being talked about - on the internet, in coffee rooms and bars; often before they're published in journals. And he gets to grips with not just the science, but with the controversies and conversation that surround it.
radioscience@bbc.co.uk
LISTEN AGAINListen听30 min
Listen to听27听March
PRESENTER
GEOFF WATTS
Geoff Watts
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Thursday听27听March听2003
Sperm fertilizing an egg

Men can鈥檛 help acting on impulse, according to the perfume advert, but neither perhaps can their sperm. Geoff Watts will be looking into the suggestion that sperm literally smell their way towards their target, the unfertilized egg. If true, it could help improve fertility treatment, and also lead to new forms of contraception that don鈥檛 use the hormones found in today鈥檚 contraceptive pills.

Also in the programme, the physics of the Earth鈥檚 core beneath our feet and how it protects us from cosmic radiation from above our heads. And could it all go wrong, as the latest Hollywood blockbuster suggests?
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