TIL that octopuses have three hearts and blue blood sciencefocus.com Submitted by real_aurora_cole t3_1249tqr on March 28, 2023 at 2:33 AM in todayilearned 26 comments 156
FlattopMaker t1_jdyi2oh wrote on March 28, 2023 at 2:49 AM I only learned this thanks to Google when I was learning about how we use horseshoe crab blue blood to test that IV drugs and implants are hygenic enough for human use. Permalink 10
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