There are n’t enough human beings on Earth to fill the Grand Canyon , and in a lifetime you do n’t produce enough saliva to even fill a swim pool . That intimate that most thing around us are countable or measurable : so how many things are there ?
That question is posed and — kinda — answered in this video by Vsauce . First , though , we postulate to serve an significant head : what counts as a affair , anyway ? Watch to happen out . [ YouTube ]
EarthMatterScience

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