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21:49 13 May 2011
A globe-trotting photographer has crafted an extensive portrait of the night sky using more than 37,000 exposures from around the world
18:59 13 May 2011
Sharpening up the tick of atomic clocks promises to make them accurate to better than a second over the lifetime of the universe
18:00 13 May 2011
All today's stories on newscientist.com, including: Fukushima fuel rods may have melted, a pedal-powered helicopter, and squid in space
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