As more snow sweeps across Britain, Tipping Point is forced to cancel the razzamatazz launch of its commissions for plays about climate change. Today's heavy snowfall, students of irony should note, is a weather event, not a climatic one. You can download the criteria and application form for the commissions here. Closing date: 4 May 2009.
Knot theory could help spacecraft navigate crowded solar systems
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It can be difficult to figure out how to move a spacecraft from one orbit
to another, but a trick from knot theory can help find spots where shifting
orbit...
3 hours ago
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