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Evolution of unicellular organisms to multicellular creatures in Cambrian Era

1996
Evolution... what is it? During the Cambrian era (nearly 540 million years ago), lots of animals evolved in a relatively short amount of time. Scientists have found that the first appearance of animals with limbs and animals with segmented bodies, as well as the first predators with jaws, claws, and teeth all appeared during this same time period Find out why the Cambrian Period is sometimes referred to as biology's Big Bang.