• Amphibians evolved about 365 million years ago from a lobe-finned lungfish ancestor.
  • For more than 100 million years, amphibians remained the dominant land vertebrates.
  • Once reptiles appeared, with their amniotic eggs, they replaced amphibians.
  • Amphibians can be found in freshwater and moist terrestrial habitats throughout the world.
  • The only continent without amphibians is Antarctica.
  • Up to one third of all amphibian species are at risk of extinction because of human actions, such as habitat destruction, climate change, and pollution.
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