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May
30
comment Can extinct animals be cloned?
The premise of Jurassic Park was that mosquitoes, with a meal of dinosaur blood, had been trapped and preserved in amber. This is distinct from fossilization - an answer needs to address this.
Dec
5
comment What is the inlet/outlet speed of air going in/out of our mouth during inhalation/exhalation
See Speed of Exhalation
Nov
9
comment Is there any biological reason for humans to rest after x days of work?
The 7-day week is a recent innovation. The Romans used an eight day week. The Incas used a ten-day week. I don't know of any evidence that prior to the last ten-thousand years people followed anything other than solar (daily and annual) and lunar (monthly) cycles.
Nov
9
comment Is there any biological reason for humans to rest after x days of work?
@Alex, Sheep spend 15% of their time sleeping, the rest is either active foraging or chewing cud.