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Pre-Noachian: the interval from the accretion and differentiation of the planet about 4.5 billion years ago to the formation of the Hellas impact basin, between 4.1 and 3.8 Gya. [13] Most of the geologic record of this interval has been erased by subsequent erosion and high impact rates.
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; [4] Mars may thus hold the best record of the prebiotic conditions leading to life, even if life does not or has never existed there. [5] [6]
Mars reaches the same solar flux as that of the Earth when it first formed 4.5 billion years ago from today. [94] < 5 billion The Andromeda Galaxy will have fully merged with the Milky Way, forming an elliptical galaxy dubbed "Milkomeda". [97] There is also a small chance of the Solar System being ejected.
While meteorites in the same family as NWA 7635 were all dated about 500 million years old — meaning they were formed from cooling magma on the surface of Mars circa half a billion years ago ...
In July 2020, the Perseverance rover underwent a 200-day, 300-million-mile journey to reach Mars. ... believed to have formed 3.9 billion years ago from a massive impact ...
In the past 500 million years there have been five generally accepted major mass extinctions that on average extinguished half of all species. [41] One of the largest mass extinctions to have affected life on Earth was the Permian-Triassic , which ended the Permian period 250 million years ago and killed off 90 percent of all species; [ 42 ...
The lunar cratering record suggests that the rate of impacts in the Inner Solar System 4000 million years ago was 500 times higher than today. [44] During the Noachian, about one 100-km diameter crater formed on Mars every million years, [3] with the rate of smaller impacts exponentially higher.
The Mars carbonate catastrophe was an event that happened on Mars in its early history. Evidence shows Mars was once warmer and wet about 4 billion years ago, that is about 560 million years after the formation of Mars. Mars quickly, over a 1 to 12 million year time span, lost its water, becoming cold and very dry.