Birth of Earth - 4.5 billion years ago, First prokaryotic cell - 3.7 billion years ago, First virus - 3 billion years ago, First photosynthetic organism - 2.7 billion years ago, Great oxidation event - 2.4 billion years ago, First Snowball Earth - 2.3 billion years ago, First eukaryotic cell - 1.8 billion years ago, First multicellular organism - 900 million years ago, First multicellular animal - 800 million years ago, Second Snowball Earth - 770 million years ago, Development of bilateral symmetry - 630 million years ago, First cnidarian - 580 million years ago, First echinoderm - 570 million years ago, Cambrian explosion - 585 million years ago, First vertebrate - 530 million years ago, Great Ordovician Biodiversification Event - 489 million years ago, Plant colonization of land - 465 million years ago, First insect - 400 million years ago, First tetrapod - 597 million years ago, First tree - 385 million years ago, Vertebrate colonization of land - 350 million years ago, First amphibian - 340 million years ago, Start of the Dinosaur Era - 250 million years ago, First bird (Archaeopteryx) - 150 million years ago, First placental mammal - 140 million years ago, First flowering plant - 180 million years ago, Dinosaur extinction - 64 million years ago, Apes split from monkeys - 25 million years ago, Gibbons split from apes - 18 million years ago, Orangutans split from apes - 14 million years ago, Gorillas split from apes - 7 million years ago, First Homo Sapiens - 500.000 years ago.
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