Dextre, a Canadian-built robot has competed a satellite refuelling trial on the International Space Station.

Currently, once they run out of fuel satellites become space junk, and nearly 200 of them are orbiting the planet, posing a risk of collisions.

In other news, Yahoo sues Facebook over disputed patents and Encyclopaedia Britannica goes paperless.

Dan Simmons presents these and other technology news stories.

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