Estimates of the age of Earth,taken from meteorites,date our planet to be approximately years old.The BEST estimate of when life emerged,based on extrapolation of known and verifiable fossils,is approximately years ago.In essence,then,life emerged approximately years after Earth formed.

Question

Estimates of the age of Earth,taken from meteorites,date our planet to be approximately ________ years old.The BEST estimate of when life emerged,based on extrapolation of known and verifiable fossils,is approximately ________ years ago.In essence,then,life emerged approximately ________ years after Earth formed.