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Earliest Animal Embryo Fossils found in China
Fossil embryos; earliest case of HIV identified from 1959 sample; can you believe everything you read in the medical press?; investigating the Earth's mantle; Charles Darwin's last book, 'Expression of the Emotions in Man and Animals'.
BBC World Service Archive
This programme was restored as part of the World Service archive project
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Science In Action
The BBC brings you all the week's science news.
