How Science Figured Out the Age of Earth

A few hundred thousand years after the Big Bang, the Universe cooled to the point where atoms could form. The age of the Earth is estimated to be 4.54 ± 0.05 billion  years (4.54 × 10 years ± 1%). This age may represent the age of the Earth's accretion, of core formation, or of the material from which the Earth formed. This dating [...]