How Long Has There Been Life On Earth at Life

How Long Has There Been Life On Earth. When it comes to the moon, it is speculated to be 4.53 billion years old. For about how many years of geological time have humans existed on earth?4.

For what percentageof time has life existed on earth?3. For what percentage of time during the earth's history has life existed on earth? Taking earth's age as nearly 4.6 billion years (by), instead of 13.7 by from big bang, unicellular life appeared nearly 3.8 by ago.

Scientists may have discovered a new layer within the

But, how long is that really? For what percentage of time during the earth's history has life existed on earth? Scientists have analyzed earth’s crust, its rocks, and those of the moon, and several meteorites, and concluded that the earth is around 4.54 billion years old, with a margin of error of about 1%. Life has an incredible amount to teach us about living well on planet earth, in no small part due to the fact that it’s been thriving here for 3.85 billion years.