Earth
Animals left behind in a world of volcanic ash
Chickens scratch for food amongst plants turned grey by the ash from the continuing eruption of Mount Sinabung in Indonesia
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Technology
See the sound a helicopter makes caught on camera
The way helicopter rotor blades produce their characteristic noise has been photographed for the first time, in a bid to make the craft run more quietly
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Earth
Blame slow jet stream for US deep freeze
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Today on 91av
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Today on 91av
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Space
Dust factory seen in the heart of an exploding star
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