Ppl have so internalized the idea Earth was made for us they don't realize how few tweaks would make Earth an "alien planet"https://twitter.com/alexcruise/status/871087456392667136 …
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The reason we don't have two-foot-long bugs today is there's literally not enough oxygen in our air, they would die instantly
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Fully liberating all buried carbon wouldn't send us back to a replica of the Carboniferous -- it doesn't work like that
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Oxygen levels were quite low for most of the dinosaur era, only reached modern levels during Cretaceous.
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