Assign numbers to the notes of the scale and you can play a musical interpretation of pi
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Many big observatories point a single laser at the sky to measure atmospheric turbulence – the Gemini South telescope has now tested a five-laser system
20:56 14 March 2011 - updated 21:11 14 March 2011
The control centre for a Japanese lab module on the International Space Station has been evacuated, and a major physics centre has shut down
00:00 10 March 2011 - updated 10:45 10 March 2011
The Red Planet's carbon-dioxide atmosphere was probably much thicker in the past – some of it may have gone into carbonate minerals that were later buried
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