Well, species die out when their environment changes, and they can't adapt, it probably meant that they were too hot or cold, and they died out.
Also humans -_-' that's why i hate myself even though im a veggie
They get hunted illegally so much that their numbers fall so much that they become extinct.
Animals in the ocean do die. They do not live forever.
%5 of animals die in circuses
10% of animals die each day.
Humans are animals, and you can die in your sleep.
there are many factors why animals die. abusing animals is also one. animals also die due to their age, weather, food, accidents and predators.
Some animals die from heart attacks, most die from getting put down
600 animals die from abuse each year.
yes some animals do die from animal cruelity
Animals can die from cosmetic testing as could humans.
animals die in zoos caused by stress and loneliness
no they do not die.
Animals die from old age and diseases