Mars, Four Billion Years Ago

Four billion years ago, Earth was a rather hellish place. Its crust was still very thin and unstable. There was heavy and violent volcanic activity. Earthquakes were shaking the ground, liquid lava flowed in many places, and poisonous gases were everywhere. On top of that, our poor little planet was bombarded by a constant barrage of large meteorites. Despite all of that, the first primitive life forms are thought to have appeared during this period.

By contrast, at the same time, Mars was a very tranquil place. Here is a NASA animation, based on the latest data we have, showing what the surface of Mars would likely have looked like at the same time. Blue skies, clouds, oceans, lakes, rivers, mountains and all. Almost like a place for a vacation resort!

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