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Can clouds of moon dust combat climate change?

A group of US scientists this week proposed an unorthodox scheme to combat global warming: creating large clouds of moon dust in space to reflect sunlight and cool the Earth.

Is social media good or bad for social unity?

We tend to talk about social media in sweeping terms: It's either the death knell for democracy or its savior. It's a tool to fight authoritarianism or a weapon to spread strategic misinformation. It polarizes us or pulls ...

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