August 11, 2012

VEGANISM, OR EATING LIKE THE LOSERS:

Early Meat-Eating Human Ancestors Thrived While Vegetarian Hominin Died Out (Katherine Harmon, August 8, 2012, Scientific American)

A team of researchers led by Vincent Balter, of École Normale Supérieure de Lyon, decided to probe into some of these debates. They used lasers to analyze the enamel from fossilized teeth belonging to Australopithecus africanus, Paranthropus robustus and early Homo specimens, which were all from southern Africa. By assessing ratios of calcium, barium and strontium as well as the number of strontium isotopes, the team was able to deduce both diet and the size of the area that these individuals ranged over. The findings were published online August 8 in Nature (Scientific American is part of Nature Publishing Group).

The ancestral Australopithecus consumed a wide range of foods, including, meat, leaves and fruits. This varied diet might have been flexible to shift with food availability in different seasons, ensuring that they almost always had something to eat. Paranthropus, according to the elemental analysis, was largely a plant eater, which matches up with previous studies of tooth morphology and wear patterns. It also helps to explain the massive jaw structure they possessed, which could have come in handy for tough food stuffs and earned one specimen the nickname "nutcracker man." Early Homo, on the other hand, went in for a meat-heavy diet--possibly enabled by the use of tools for hunting and butchering.

Posted by at August 11, 2012 9:25 AM
  

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