Mammals, Birds, Reptiles, Fishes, Amphibians, and Insects
Animals first appeared in the sea over 600 million years ago, and subsequently evolved to live in the majority of Earth’s aquatic and terrestrial (land) habitats. Today, animals are found all around the world, from the Rain forests of South America to the frozen shores of Antarctica, with every continent being home to a unique collection of species.The world is home to a vast number of animals; there are over 1.5 million recognized living animal species, and likely millions more still to be discovered and named.
Story added by user_239970 on December 29, 2023
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