Rapidcreek@lemmy.world to politics @lemmy.world · 6 months agoDonald Trump complains about being called "cognitively impaired"www.newsweek.comexternal-linkmessage-square40fedilinkarrow-up1284arrow-down116
arrow-up1268arrow-down1external-linkDonald Trump complains about being called "cognitively impaired"www.newsweek.comRapidcreek@lemmy.world to politics @lemmy.world · 6 months agomessage-square40fedilink
minus-squareArcaneSlime@lemmy.dbzer0.comlinkfedilinkarrow-up3·6 months agoAs a veteran scuba instructor, I have touched dozens of sharks with my bare hands. Every one had very rough skin, like medium sandpaper.
minus-squareGrabthar@lemmy.worldlinkfedilinkarrow-up3·6 months agoIndeed. Placoid scales are a defining feature of Elasmobranchs.
minus-squareMeThisGuy@feddit.nllinkfedilinkarrow-up2·6 months agothat’s why they swim so smooth in the ocean. that or a few million years of evolution
minus-squaretheneverfox@pawb.sociallinkfedilinkEnglisharrow-up2·6 months agoI don’t know what to tell you, I’m petting a shark right now and it’s like touching silk. In both directions, couldn’t be smoother
As a veteran scuba instructor, I have touched dozens of sharks with my bare hands. Every one had very rough skin, like medium sandpaper.
Indeed. Placoid scales are a defining feature of Elasmobranchs.
that’s why they swim so smooth in the ocean.
that or a few million years of evolution
I don’t know what to tell you, I’m petting a shark right now and it’s like touching silk. In both directions, couldn’t be smoother