How Long Has Life Been On Earth at Life

How Long Has Life Been On Earth. Recognizable humans emerged at most 2 million years ago, a vanishingly small period on the geological scale. The timeline of life on earth begins over 4.5 billion years ago.

Crocodylidae, or true crocodiles, first appeared somewhere around 55 million years ago, in the early eocene. Earth’s first life appeared early in the planet’s history, nearly 4 billion years ago, when primitive bacteria appeared in sulfurous oceans under poisonous skies. We aren’t quite sure if they go back all the way to the “beginning”.

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They are likely around 3+ billion years old, perhaps up to 3.7 billion years. They had modern faces and used stone tools. The life on earth series shows the presenter david attenborough travelling around the globe to cover how life has evolved on the planet. The big question, how long have humans been on earth?