Extreme environment

Physiologists have long known that organisms living in extreme environments are especially likely to exhibit clear examples of evolutionary adaptation because of the presumably intense past natural selection they have experienced.

Astrobiologists have not yet found life in any environments beyond Earth, though experiments have shown that tardigrades can survive the harsh vacuum and intense radiation of outer space.

[3][4] Many different habitats can be considered extreme environments, such as the polar ice caps, the driest spots in deserts, and abysmal depths in the ocean.

Over years of evolution and adaptation to this extremely cold environment, both microscopic and larger species have survived and thrived no matter what conditions they have faced.

[6] By changing their eating patterns and due to their dense pelt or their body fat, only a few species have been capable of adapting to such harsh conditions and have learned how to thrive in these cold environments.

Species that are able to store water and have learned how to protect themselves from the Sun's harsh rays are the only ones that are capable of surviving in these extreme environments.