i’m sure you’ve never thought about it before, but science has to probe to the very bottom of things…

Penis Worms Help Solve Unusual Evolutionary Puzzle

Yep, you read that right. This, enigmatic marine invertebrate known as a penis worm is shedding new light on the evolution of digestion by posing a curious question: which develops first, the mouth or the anus

Living in shallow waters and measuring up eight inches long, these worms are “living fossils” that have changed very little since their priapulid ancestors thrived on the ocean floor in the Cambrian period some 500 million years ago.

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  1. makemeohsoclever reblogged this from discoverynews
  2. selfia reblogged this from rainbow-hammock
  3. rainbow-hammock reblogged this from discoverynews
  4. dreamofbecoming reblogged this from scishow
  5. pollywolf reblogged this from discoverynews
  6. ast-road reblogged this from discoverynews and added:
    mungkinkah ‘v*gina’ worm juga ada? :|
  7. hrollvekjandi reblogged this from scishow
  8. ironmetallica reblogged this from scishow
  9. lazyducklings reblogged this from discoverynews
  10. sarahwuh reblogged this from discoverynews
  11. abikewithtwosparklers reblogged this from discoverynews
  12. listen-look-feel reblogged this from discoverynews
  13. itsdds reblogged this from discoverynews
  14. lepidopterror reblogged this from scishow
  15. crystalmir reblogged this from pineapplesquid and added:
    I don’t see how the sea cucumber could be more closely related to us than to another worm-esque underwater...
  16. better--be--gryffindor reblogged this from scishow
  17. paperclipkeeper reblogged this from scishow
  18. pineapplesquid reblogged this from crystalmir and added:
    Jen, it’s the wrong phylum. The sea cucumber is more closely related to us than it is to this. Aaand, speaking of...
  19. destinytheterrible reblogged this from welcometowherethewildthingsare
  20. thebrideofbeetlegeuse reblogged this from welcometowherethewildthingsare
  21. ask-mrbojangles reblogged this from scishow
  22. isthatnotgood reblogged this from welcometowherethewildthingsare
  23. welcometowherethewildthingsare reblogged this from epicmurdock
  24. snh-snh-snh reblogged this from justmissjac and added:
    I REMEMBER THAT! IT WAS SO COOL! I still have pictures! These things are cool!
  25. justmissjac reblogged this from kalliopestarmist and added:
    Kallie, you are undoubtedly the most interesting conversationalist.
  26. kalliopestarmist reblogged this from crystalmir and added:
    I HAVE DISSECTED ONE OF THESE AND IT WAS AWESOME. And no, this is not a sea cucumber. Honestly, Jen, they look nothing...
  27. being-caroline reblogged this from scishow and added:
    EW.
  28. inspiredbygoats reblogged this from scishow
  29. tangentmind reblogged this from scishow and added:
    I always thought it was the chicken or the egg…but this is equally, if not more, important.
  30. drowning-within-myself reblogged this from scishow
  31. ineffabili-tea reblogged this from scishow
  32. leehunmi reblogged this from scishow and added:
    It doesn’t even look like a penis since when do we have FUCKING TENTACLES.
  33. cosmichorrors reblogged this from fatripple