From National Geographic News:

_Human hunters are pushing their prey to evolve faster than they would naturally, resulting in smaller and younger individuals over time, according to a new study.

_Hunters’ desire for the largest individuals–the “trophies”–influences plant and animal populations faster than natural selection and even other human impacts, such as pollution and habitat destruction . . . .

The body and horn sizes of bighorn sheep, for example, have declined by about 20 percent in the past three decades as a result of human hunting. . . .

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