We don’t know much about the target asteroid of Nasa’s imminent Dart mission, so it’s hard to predict what will happen when we crash into it.
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An asteroid that landed in Russia in 2013 injured 1,500 people – and was just 20 metres in diameter. What could we do if a major threat was detected?
NASA’s Asteroid Redirect Mission has had its funding cut. Here’s why politicians should think again.
Whatever America’s exact strategy in space, it doesn’t seem to involve investing in a new International Space Station
