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On monday, an asteroid the size of a 15 storey building passed within 40000km from earth. That's one sixth the distance to the moon, and about twice the distance of geo-sync satellites. If it hit on land, it would have threatened life all over the planet, if it hit in the ocean it would have triggered 50m tsunamis all over the world. It has been monitored for months
Be open-minded, but not so much that your brain falls out
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