Enigma Number 1773
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Today on 91av
All the latest on newscientist.com: why richer people have fewer kids, a better world by 2050, mini space shuttle crash, Africa's largest wind farm and more
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Earth
Satellite rainbow shows where Earth is splitting apart
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Today on 91av
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Life
Scrimshaw skull was canvas for whaling artists
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Life
‘Egg’ in cellular nest shows off the Small World
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