@truewild1: Every continent has lost species that will never come back. Africa lost the quagga — half zebra half horse — last one died in Amsterdam Zoo in 1883 and was only photographed once. Asia's woolly mammoth survived on Wrangel Island until 2000 BC when the Egyptian pyramids already existed. North America's passenger pigeon was once the most numerous bird on Earth at 3 to 5 billion strong. The last one died alone in a cage in 1914. Australia's thylacine or Tasmanian tiger was the last of its kind when it died alone in Hobart Zoo in 1936. Footage of the last one still exists. Scientists are currently attempting to bring it back. Europe's aurochs was the ancestor of every domestic cow alive today. The last one died in Poland in 1627. The Pyrenean ibex went extinct in 2000 when the last one was killed by a falling tree. Scientists cloned it in 2003. The clone survived for 7 minutes. Which extinction hits you the hardest? Comment below. #extinct #animals #thylacine #mammoth #dodo