much better for walking

Common chimps were the perfect place to start. Not only are they a classic example of the walkinganimal, but they’re also our closest living relative; after more than six million years of separateevolution, we still share 95 percent of our DNA sequence with chimps. But what we don’t share,Bramble noted, is an Achilles tendon, which connects the calf to the heel: we’ve got one, chimpsdon’t. We have very different feet: ours are arched, chimps’ are flat. Our toes are short andstraight, which helps running, while chimps’ are long and splayed, much better for walking. Andcheck out our butts: we’ve got a hefty gluteus maximus, chimps have virtually none. Dr. Bramblethen focused on a little-known tendon behind the head known as the nuchal ligament. Chimpsdon’t have a nuchal ligament. Neither do pigs. Know who does? Dogs. Horses. And humans.

Now this was perplexing. The nuchal ligament is useful only for stabilizing the head when ananimal is moving fast; if you’re a walker, you don’t need one. Big butts are only necessary forrunning. (See for yourself: clutch your butt and walk around the room sometime. It’ll stay soft andfleshy, and only tighten up [url=http://kliuyyly.anime-festa.com/Entry/24/][color=#333333]with her, [/color][/url][url=https://ameblo.jp/loiyyy/entry-12312733921.html][color=#333333]he would [/color][/url][url=http://blog.51.ca/u-576591/2017/09/21/秋天吃這兩種水果最養人，誰吃誰知道/][color=#333333]sanction [/color][/url][url=http://blog.dwnews.com/post-973071.html][color=#333333]everything[/color][/url][url=http://blog.livedoor.jp/hanbaby/archives/18817626.html][color=#333333] at once[/color][/url][url=http://blog.qooza.hk/fragment?eid=29103240][color=#333333]he answered.[/color][/url]
when you start to run. Your butt’s job is to prevent the momentum ofyour upper body from flipping you onto your face.) Likewise, the Achilles tendon serves nopurpose at all in walking, which is why chimps don’t have one. Neither did Australopithecus, oursemi-simian four-million-year-old ancestor; evidence of an Achilles tendon only began to appeartwo million years later, in Homo erectus.