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6 ημέρες πριν · The geologic time scale is a way of representing deep time based on events that have occurred throughout Earth's history, a time span of about 4.54 ± 0.05 Ga (4.54 billion years). It chronologically organises strata, and subsequently time, by observing fundamental changes in stratigraphy that correspond to major geological or paleontological ...
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.
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).
4 ημέρες πριν · Like the rest of the Solar System's planets, Neptune formed about 4.5 billion years ago. According to scientists, the blue planet formed closer to the Sun than it is now and settled into its current position in the outer Solar System about 4 billion years ago.
23 Ιουν 2024 · Scientists have conducted various studies to understand the history of water on Earth. One study suggested that over four billion years ago, a rock the size of Mars collided with a larger rock, creating so much heat that the surface melted and the two bodies merged.
12 Ιουν 2024 · The initial rise of molecular oxygen (O2) shortly after the Archaean–Proterozoic transition 2.5 billion years ago was more complex than the single step-change once envisioned.
5 ημέρες πριν · Thirdly, the comparison of crater densities between the lunar highlands and maria indicates that the moon experienced a late heavy bombardment event, with the impact flux significantly higher...
