How Blood Evolved (Many Times)
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Published 2019-01-15
↓ More info below ↓
Blood is one of the most revolutionary features in our evolutionary history. Over hundreds of millions of years, the way in which blood does its job has changed over and over again. As a result, we animals have our familiar red blood. But also blue blood. And purple, and green, and even white.
Thanks to Julio Lacerda, Lucas Lima, Franz Anthony of Studio 252mya for several illustrations throughout this episode. You can find more of their work here: 252mya.com/
Produced for PBS Digital Studios.
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References:
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All Comments (21)
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Our friends over at Bizarre Beasts made a spectacular video about the clear blood of the crocodile icefish. It also happens to be hosted by a familiar face...https://youtu.be/DtufV5JZLW4
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How the hell did butterflies evolve to melt themselves and reform into a completely different shape?
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You've done nothing but inform the mosquito army of our greatest secret.
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Family: blood is thicker than water Me: angry ice fish noises
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What blows my mind is that for around 90% of Earth's existence we only had simple life. Larger complex life didn't arise until much more recently.
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I'd love to see how hair evolved. And the difference between mammal and arthropod hair.
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PBS Eons: releases video about blood Mosquitoes: Heavy breathing
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Dracula: I want to drink your iron based protein structures with hemogloben designed to transport oxygen. Scientist: Yeah, okay.
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“They all have bilateral symmetry” Flatfish: “Am I a joke to you?”
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That guy asking for the blood video since forever must be very happy
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i see lots of people saying 'finally' but not enough saying 'thank you', so... thank you for making the video so many of us asked for!!
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As a dungeon master for d&d, I need to make a solid mental note about this. Lizards and lizardfolk can have green blood, arthropods can have blue blood, worms can have purple blood (awesome) and arctic beasts can bleed a clearish, white blood. I might stick with describing arctic beasts having red blood because I'd like to avoid unnecessary semen jokes and the mental image of red blood on white snow is always very evocative.
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Amazing. First time I hear about copper being used instead of iron. Great job, perfectly explained.
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The BLOOD video, YESSSSSSSS!
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I understood about 5% of that. That's 5% more than i knew before. Really interesting stuff thanks.
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Thank you, Hank Green for explaining even the most complex subjects in an entertaining and engaging way.
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Gives a whole new meaning to “we all bleed red”
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the question I've seen in the comments of every single video and its finally here
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You could say thats a bloody good subject
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I’m glad there’s channels like these or else I’d be watching meme compilations and meme review all day.
