<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Sun, Oct 18, 2026 at 3:55 AM Ben Zaiboc via extropy-chat <<a href="mailto:extropy-chat@lists.extropy.org">extropy-chat@lists.extropy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On 17/10/2026 22:35, John K Clark wrote:<br>
><font size="4"><b> <span class="gmail_default" style="font-family:arial,helvetica,sans-serif">> </span>Yes but I don't see why Bipedal walking would be better at endurance than quadratic walking, if anything the reverse would seem more likely to me. </b></font><br>
<br>
<br><font size="4"><i>
<span class="gmail_default" style="font-family:arial,helvetica,sans-serif">> </span>I've wondered this myself before, but it seems to be true. I put it to the test, years ago, with a friend's dog. I used to take it for walks on a large open space of grass, and although the dog could run much faster than me, I would often wear it out by just steadily jogging after it. It would run off, sit down to have a rest until I got near, run off again, etc, etc., it was easy for me to keep jogging at a steady pace, and eventually the dog would slow down, start trotting, but I always caught up to it, and it was absolutely knackered after a while, then we'd go home.</i></font><br></blockquote><div><br></div><div><font size="4" face="tahoma, sans-serif"><b>Yes but that has nothing to do with bipedalism.<span class="gmail_default" style=""> Dogs are covered with fur which is vital in the winter but a disadvantage in the summer. Humans have clothes that they can put on in the winter and take off in the summer, so they don't need fur, and unlike dogs human naked skin has sweat glands which enables them to efficiently cool off. </span> </b></font></div><div><font size="4" face="tahoma, sans-serif"><b><br></b></font></div><div><font size="4" face="tahoma, sans-serif"><b><span class="gmail_default" style="">John K Clark</span><br></b></font></div><div><br></div><div><br></div><div><br></div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Perhaps quadripeds are better at speed, but humans seem better adapted for steady, long-distance running. Perhaps there's a psychological aspect as well. I think wolves can patiently trot and wear prey down in a similar way, so maybe it's just that most prey animals are wired to run off as fast as possible, which wears them out quickly. Perhaps it's about being chased vs. chasing rather than biped vs. quadruped.<br>
<br>
Looking at the biomechanics, being tall, with 2 legs, might be more efficient for running than being short with 4 legs. With bipeds, gravity does some of the work, which is not so with quadrupeds, or a lot less so. Consider ostriches, they are even better than humans at both speed and distance running, due to their legs being skinnier and lighter, and the muscles that operate them being closer to their centre of gravity, so less effort to swing the legs.<br>
<br>
This site: <a href="https://wildlifeanswers.blog/animals-run-longer-than-humans" rel="noreferrer" target="_blank">https://wildlifeanswers.blog/animals-run-longer-than-humans</a> says the most significant factor is heat dissipation. We are long and thin, almost entirely hairless, with lots of sweat glands, so much better at keeping cool during exercise than squat, hairy beasts with many fewer sweat glands, that have to stop and pant to get rid of heat. Huskies beat us hands down in cold weather, so this looks like a believable explanation.<br>
<br>
-- <br>
Ben<br>
"The world will not be destroyed by those who do evil, but by those who watch them without doing anything." - Pablo Casals, via Albert Einstein<br>
<br>
_______________________________________________<br>
extropy-chat mailing list<br>
<a href="mailto:extropy-chat@lists.extropy.org" target="_blank">extropy-chat@lists.extropy.org</a><br>
<a href="http://lists.extropy.org/mailman/listinfo.cgi/extropy-chat" rel="noreferrer" target="_blank">http://lists.extropy.org/mailman/listinfo.cgi/extropy-chat</a><br>
</blockquote></div></div>