/u/moneyshaker's posts in /r/askscience
What has to change in the COVID-19 virus for it to be reclassified as something new? Why call it COVID-19 Delta Variant, rather than COVID-21?
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100 deg is twice as hot as 50 deg. What would be twice as cold as 50 deg? What would be twice as cold as 0 deg?
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If concrete can only last a few decades, what's the plan to ensure all our existing skyscrapers don't come crashing down?
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