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From a Galapagos tortoise to one black rhino subspecies, these 11 species have been declared extinct or possibly extinct over the past half-century. Learn about the extinct animals that once roamed the Earth, from Ice Age mammals to recent amphibians. Find out the reasons behind their extinction, such as habitat loss, hunting, climate change, and more. This page features lists of species and organisms that have become extinct. The reasons for extinction range from natural occurrences, such as shifts in the Earth's ecosystem or natural disasters, to human influences on nature by the overuse of natural resources, hunting and destruction of natural habitats. 10 of the world's most endangered animals Currently, more than 47,000 species have been assessed to be under threat of extinction according to the IUCN.
