Composer Michael Berkeley writes, 'Those of us who support the government's determination to lower CO2 emissions, yet care passionately about preserving our most beautiful landscapes, are in a serious quandary.'
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...
5 hours ago
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