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Watching a Supernova Explode
An exploding supernova; how the HIV virus evades the immune system; personal weather satellite receivers; forensic archaeology helps today's crimefighters; why men outnumber women in India and the country's 40-50 million missing women.
BBC World Service Archive
This programme was restored as part of the World Service archive project
Podcast
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Science In Action
The BBC brings you all the week's science news.
