Do you have any idea how high a bird can fly
in the air. The higher the altitude is, the lower the temperature and oxygen
level are, which makes it very expensive not only to function but also just to
live.
This extreme experiment seems to have revealed
that the bar-headed goose is able to outperform the human, of course without
any oxygen mask at the highest point on earth, 9000m, the peak of the Mount
Everest.
Enjoy reading and learning from this
experiment.
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