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1 ημέρα πριν · The earliest undisputed evidence of life on Earth dates at least from 3.5 billion years ago, during the Eoarchean Era, after a geological crust started to solidify following the earlier molten Hadean Eon.
1 Ιουλ 2024 · 4.6 billion years ago: The formation of Earth began within the solar nebula, a cloud of gas and dust left over from the formation of the Sun. Dust particles collided and stuck together, forming ever-larger aggregates.
6 ημέρες πριν · The Archean Eon was preceded by the Hadean Eon, an informal division of geologic time spanning from about 4.6 billion to 4 billion years ago and characterized by Earth’s initial formation. Records of Earth’s primitive atmosphere and oceans emerge in the earliest Archean (Eoarchean Era).
3 ημέρες πριν · At least two-thirds of Mars' surface is more than 3.5 billion years old, and it could have been habitable 4.48 billion years ago, 500 million years before the earliest known Earth lifeforms; Mars may thus hold the best record of the prebiotic conditions leading to life, even if life does not or has never existed there.
18 Ιουν 2024 · Geological evidence provides support for models of the origin of life on Earth by providing information about the conditions on the planet during its early history. For example, it is known that Earth formed approximately 4.6 billion years ago (bya), and that the environment was too hostile for life until about 3.9 bya.
2 ημέρες πριν · The geologic record of the continent of Europe is a classic example of how a continent has grown through time. The Precambrian rocks in Europe range in age from about 3.8 billion to 541 million years. They are succeeded by rocks of the Paleozoic Era, which continued to about 252 million years ago; of the Mesozoic Era, which lasted until about ...
3 ημέρες πριν · Stellarium Web is a planetarium running in your web browser. It shows a realistic star map, just like what you see with the naked eye, binoculars or a telescope.
