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J Scott Hill

Food For Thought: Meat-Based Diet Made Us Smarter : NPR - 1 views

www.npr.org/...eat-based-diet-made-us-smarter

evolution human thought food diet

shared by J Scott Hill on 29 Jan 13 - No Cached
  • Our earliest ancestors ate their food raw — fruit, leaves, maybe some nuts. When they ventured down onto land, they added things like underground tubers, roots and berries.
  • "You can't have a large brain and big guts at the same time," explains Leslie Aiello, an anthropologist and director of the Wenner-Gren Foundation in New York City, which funds research on evolution. Digestion, she says, was the energy-hog of our primate ancestor's body. The brain was the poor stepsister who got the leftovers.
  • "What we think is that this dietary change around 2.3 million years ago was one of the major significant factors in the evolution of our own species," Aiello says.
  • ...7 more annotations...
  • cut marks on animal bones appeared
  • that could have been made only by a sharp tool.
  • But Aiello's favorite clue is somewhat ickier — it's a tapeworm. "The closest relative of human tapeworms are tapeworms that affect African hyenas and wild dogs," she says.
  • Besides better taste, cooked food had other benefits — cooking killed some pathogens on food.
  • It breaks up the long protein chains, and that makes them easier for stomach enzymes to digest. "
  • collagen is very hard to digest. But if you heat it, it turns to jelly."
  • starchy foods like turnips, cooking gelatinizes the tough starch granules and makes them easier to digest too. Even just softening food — which cooking does — makes it more digestible. In the end, you get more energy out of the food.
  • J Scott Hill on 29 Jan 13
     
    Interesting audio piece on cooked food, meat, and the evolution of our big brains.
Michael Savery

What are the major questions concerning the Darness in El Dorado controversy? - 72 views

I think the whole point of the article was to not only bring attention to Chagnon and Neel's flawed vaccination program but bring to light potential atrocities that other anthropologists have commi...

questions

started by J Scott Hill on 31 Jan 13 21 follow-ups, last by Michael Savery on 07 Feb 13
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