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【科学60秒】进化还是做胖纸，这是个问题！
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Food is the body’s fuel. [ 1 ]. And the research, published in the Proceedings of the National Academy of Sciences, could explain an ancient leap in human evolution. [Rachel N. Carmody, Gil S. Weintraub and Richard W. Wrangham, "Energetic consequences of thermal and nonthermal food processing"]
[ 2 ]. But Harvard scientists fed two groups of mice either meat or sweet potatoes and prepared the items differently: either whole or pounded, raw or cooked—to create a variety of diets.
The researchers then measured the mice. [ 3 ]. And that cooking increased weight the most.
[ 4 ], starting almost two million years ago. Those physical changes required more energy, and exposing food to fire may have provided that boost.
Of course, a legacy of evolution is that modern humans often gain too much weight. [ 5 ].
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