Whichever way they use, though, they still have to get out to see a doctor. Everest The tallest mountain in the world. A long and often difficult trip into the wilderness. The body can begin to shut down if you don't get help. It is easy to prevent exposure from happening by doing the right things.
Animals become extinct for different reasons.
Sometimes they become extinct because too many of them are killed by hunters, and sometimes they become extinct because too much of the land they live on is taken over by humans. Sometimes they become extinct and nobody knows why. The word extinct can also be used to talk about volcanoes. An extinct volcano is one that is no longer active and will not erupt again.