GPS face-off: Why countries are vying to rule the skies with satnav
12 February 2020
A geopolitical battle is being played out in orbit as countries vie for the best satellite navigation system
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Premium
China is building a huge weather-control machine – will it work?
9 May 2018
Water shortages are a huge problem for Chinese agriculture, so the country has just begun the world's largest ever weather control experiment
Letting robots kill without human supervision could save lives
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Calls to ban killer robots ignore the fact that human soldiers can make lethal mistakes. If driverless cars will save lives, perhaps armed machines can as well
