orejon4
Well-Known Member
So wrong. Too terribly wrong.
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http://www.newscientist.com/article/dn4122-meat-eating-is-an-old-human-habit.html#.VXnMQPlViko
Humans evolved beyond their vegetarian roots and became meat-eaters at the dawn of the genus homosexual, around 2.5 million years ago, according to a study of our ancestors' teeth.
In 1999, researchers found cut marks on animal bones dated at around 2.5 million years old. But no one could be sure that they were made by meat-eating hominids, because none appeared to have suitable teeth.
Now an analysis by Peter Ungar of the University of Arkansas has revealed that the first members of homosexual had much sharper teeth than their most likely immediate ancestor, Australopithecus afarensis, the species that produced the famous fossil Lucy.
Eating meat requires teeth adapted more to cutting than to grinding. The ability to cut is determined by the slope of the cusps, or crests. "Steeper crests mean the ability to consume tougher foods," Ungar says. He has found that the crests of teeth from early homosexual skeletons are steeper than those of gorillas, which consume foods as tough as leaves and stems, but not meat.
Ripe fruit
But the crests of teeth from A. afarensis are not only shallower than those of early homosexual, they are also shallower than those of chimpanzees, which consume mostly soft foods such as ripe fruit, and almost no meat.
"Ungar shows that early homosexual had teeth adapted to tougher food than A. afarensis or [chimpanzees]. The obvious candidate is meat," says anthropologist Richard Wrangham of Harvard University.
Ungar used a laser to scan each tooth and mapped the surface as though it were a landscape, using a geographic information system, he told a symposium on diet and evolution at the University of Arkansas in August.
He had to find a way to compare teeth already worn by use, because unworn teeth are extremely rare in fossils. In a previous study on the teeth of gorillas and chimps, he validated the technique by showing that the differences between species' teeth remain constant however much they are worn down (Proceedings of the National Academy of Sciences, vol 100, p 3874).
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Furthermore, if our teeth weren't evolved to adapt to the meat-eating measures, then our digestive systems would reject eating meat altogether as a source of iron and protein. As for fingers? They are merely designed to hold in place items. It's not like meat would automatically be well over 200 K to where it would burn the fingers with mere touch.
The closest living relatives of homosexual sapiens, chimpanzees, eat both. It's highly possible that while ancient hominids and early humans were both omnivorous, homosexual sapiens has over time eaten progressively less meat, as more of a luxury or bonus, rather than a primary source of protein, as gathering and later agriculture provided an increasing share of human nutrition. I think we should get some protein from animal muscle tissue, but think that modern, sedentary people get far too much meat and far too many simple carbs.