The chart in question showed energy consumed per unit distance traveled.
At bottom a cluster of various creatures and vehicles including man, with birds at the top.
A big gap then half way up was a human on bicycle.
Another big gap and then at the top, jet passenger aircraft.
In Scientific American a long time ago. It was a sidebar and might be hard to search for.
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The chart in question showed energy consumed per unit distance traveled. At bottom a cluster of various creatures and vehicles including man, with birds at the top. A big gap then half way up was a human on bicycle. Another big gap and then at the top, jet passenger aircraft. In Scientific American a long time ago. It was a sidebar and might be hard to search for.