Is there a limit to how small life can be? Or how big? Neil deGrasse Tyson and Chuck Nice break down why all craters on the moon are round, the scale to life, and why the length of the day isn’t 24 hours.

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Why Craters Are Round, Size of Life, The Real Length of Day – TYTYK

StarTalk with Neil deGrasse Tyson

Why Craters Are Round, Size of Life, The Real Length of Day – TYTYK