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CTR Weekly 09/30/2020
Google Kids Space, Universe in a Nutshell,

"A single Coronavirus particle is to a grain of sand what a grain of sand is to a three story house. And if a Coronavirus particle were the size of a grain of sand, a human would be 11 miles tall. It's amazing how much damage a tiny grain of sand can do to a world of giants that big.” One of ...

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