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The First Animals. These clusters of specialized, cooperating cells eventually became the first animals, which DNA evidence suggests evolved around 800 million years ago. Sponges were among the earliest animals.
The earliest evidence for life on Earth includes: 3.8 billion-year-old biogenic hematite in a banded iron formation of the Nuvvuagittuq Greenstone Belt in Canada; graphite in 3.7 billion-year-old metasedimentary rocks in western Greenland; and microbial mat fossils in 3.48 billion-year-old sandstone in Western Australia.
14 de jul. de 2009 · The first animals to do so were probably euthycarcinoids – thought to be related to centipedes and millipedes. Nectocaris pteryx lives around this time.
The Ediacara biota, which flourished for the last 40 million years before the start of the Cambrian, were the first animals more than a very few centimetres long.
By the dawn of the Phanerozoic Eon, life had insinuated itself between the Sun and Earth, both on land and in the waters of the world. For example, the major groups of marine animals such as mollusks and arthropods appeared for the first time about 541 million years ago at the base of the Cambrian Period of the Phanerozoic Eon
By The Human Origin Project. Evolution and the timeline of life on earth happened in stages over 4.6 billion years. From cyanobacteria to fungi. Dinosaurs and chickens. Whales and cows. Monkeys to humans, the evolution of life is a story with surprising twists. Earth has been home to over five billion different species of organisms.
28 de jun. de 2023 · Animals* first occur in the fossil record around 574 million years ago. Their arrival appears as a sudden ‘explosion’ in rocks from the Cambrian period (539 million years ago to 485 million years ago) and seems to counter the typically gradual pace of evolutionary change.
