Learn about the causes and consequences of the extinction of 100 animal species in the last 200 years. See photos and facts of amphibians, big cats, birds, fish, game animals, horse breeds, insects, marsupials, reptiles, and shrews, bats and rodents. From a Galapagos tortoise to one black rhino subspecies, these 11 species have been declared extinct or possibly extinct over the past half-century. Over the planet’s 4.5-billion-years in existence, an estimated 99% of all species that have ever lived on Earth are now extinct. This staggering figure includes countless forms of life that evolved and disappeared, either adapting, evolving, or fading away. 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.
