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sperm, sperm whale, cow, biology, aatish bhatia, brad purnell, teded, tededucation, ted-ed, aatish, bhatia, brad, purnell
Source: teded.tumblr.com
  • #sperm
  • #sperm whale
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  • #aatish bhatia
  • #brad purnell
  • #teded
  • #tededucation
  • #ted-ed
  • #aatish
  • #bhatia
  • #brad
  • #purnell
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