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Crash Course History of Science History of Science Episode 20 Earth Science 2018

It's Earth Science time!!!! In this field, natural philosophers were asking questions like, what’s up with fossils? Are they the remains of extinct organisms? Or are they so-called “sports of nature”—rocks that just happen to look like living things but don’t /mean/ anything? And most importantly, how old is… everything?

  • Released: 2018-09-10
  • Runtime: 12 minutes
  • Genre: Documentary
  • Stars: Hank Green
  • Director:
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