/u/SaxManSteve's posts in /r/askscience

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Is it possible to compare the rate of biodiversity loss during the current Holocene extinction event and the extinction event that wiped out the dinosaurs (Cretaceous-Tertiary)? If it's possible, which one had the highest rates of biodiversity loss and in what timespan?

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Why did COVID-19 spread globally while other coronaviruses like SARS and MERS only spread locally before being contained?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Is it possible to compare the rate of biodiversity loss during the current Holocene extinction event and the extinction event that wiped out the dinosaurs (Cretaceous-Tertiary)? If it's possible, which one had the highest rates of biodiversity loss and in what timespan?	1
Why did COVID-19 spread globally while other coronaviruses like SARS and MERS only spread locally before being contained?	1