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zakruti.com » Knowledge, science, education » WIRED
Every 'Useless' Body Part Explained From Head to Toe

Every 'Useless' Body Part Explained From Head to Toe

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Rating: 4.5; Vote: 2
Dr. Jeffrey Laitman joins WIRED to break down every useless, vestigial organ and structure in our evolved human bodies. From the wisdom teeth and our simian tailbones down to muscles made less important by our double-arched feet, Dr. Laitman highlights where it came from and how it ended up still inside of us. squirrel: I just wanted to share a little fact! Humans and chimpanzees actually have comparable amounts of hair follicles, but the hair on our body is much more fine than compared to that of a chimp, and it makes us seem like we have less hair. We do have less by volume, but perhaps not by individually counting them. Whether or not we have more or less hair than a chimpanzee really depends on how you ask the question.
Date: 2023-08-04

Comments and reviews: 7


I have flat feet, and unfortunately passed it on to all four of my children. As far as we ve been able to determine, no one else in my immediate family, or immediate ancestry, had or has flat feet. It s very inconvenient and has resulted, so far, in my having three surgeries to one of my feet. All of my children have to use prescription orthoses. It never occurred to me to start trying to walk on all fours. If only I knew this before.
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If I were a mad scientist with governmental approval and blank check funding, I would make it a passion project to return a lot of these Vestigial parts to full functionality. Or at least the ones that would either prove useful to us today or are annoyances in their current form.
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Speaking of hair, the most isolated indigenous people barely have hair on their chest, arm or legs and they have been living outside all the time with thr least clothes on. So why did they lose hair?
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The doctor explained it soo well. I've been trying to find a video on this topic, and this is by far the best as he explain's it in an understandable way without going into too much depth.
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Problem: muscles waste a lot of energy as heat.
Reasonable solution: make the muscle more power efficient
Evolutionary solution: implement evaporative cooling.

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My auricular muscles are fully working. I can move my ears quite a bit back and forth as well as up and down weird flex, I know.
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I have always found vestigial traits fascinating, this was a phenomenal video! Excellent job, I give it 10 out of 10 Goosebumps!
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