What are Some Extinct Animal Species?
An animal species becomes extinct when no specimens remain alive, although breeding capabilities may have already ceased. Because many animals have a large natural habitat, exact dates of extinction are often difficult to determine. Historically, animal extinction has been caused by many factors including climate change, massive planet events such as meteor impact, prevailing genetic problems and destruction by predators. Most commonly in modern times, extinct animal species have been largely killed off by human influence, with some experts suggesting that human encroachment will cause half of all life forms to become extinct within the next century. In the animal world, the reality of modern animal extinction is already comprehended.