Clues to how birds began to fly
For the first time, researchers have measured what is known as the ground effect of flying animals -- and it turns out that they save a lot more energy by flying close to the ground than previously believed. The study supports one of the theories on how birds began to fly.
from Latest Science News -- ScienceDaily https://ift.tt/2P9aDSW
from Latest Science News -- ScienceDaily https://ift.tt/2P9aDSW
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