Ancient DNA from Rare Fossil Reveals That Polar Bears Evolved Recently and Adapted Quickly

Polar bears are a geologically very new species-

This is quite relevant because we have been discussing how grizzly bears are displacing polar bears in the Arctic.  We already knew brown bears were polar bears’ ancestors.

Ancient DNA from Rare Fossil Reveals That Polar Bears Evolved Recently and Adapted Quickly. Science Daily.

Human fishing and hunting is accelerating evolution of species

Result is mostly toward smaller and shorter-lived individuals-

Human fishing and hunting accelerating evolution of species. Fishing and hunting by humans is accelerating the speed of evolution in some species as it removes whole generations of large adults who would otherwise reproduce. By Richard Alleyne, Science Correspondent. UK Telegraph.

Assuming that the prey does not become extinct, this finding is just what you’d predict when faced with heavy hunting, harvest, or whatever you call it. Heavy predation speeds up evolution, and the direction of the evolution is in the direction that makes the prey less desirable (such as smaller).  Therefore, more of the prey survive by evolving into something not so sought after by humans.

Predators Do More Than Kill Prey

Predation does more than affect ecosystem dynamics, it also shapes the evolution of prey species.

Predators Do More Than Kill Prey. Science Daily.

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