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‘Space junk’ will become more of a problem for Earthlings, but a single mission to fetch just 1 craft costs $123 million
Any debris created by damaged satellites measuring larger than 1 cm can pose huge threats to other active, low-orbiting ...
Spacefarers may contaminate other worlds – but scientists have plans to keep the cosmos clean
The US wants to put a flag on Mars. But there’s a risk it could carry unwanted stowaways that might compromise future ...