How Old Is Earth -

To make that massive number easier to visualize, imagine Earth’s entire history squeezed into a single : 12:00 AM: Earth forms. 4:00 AM: First simple, single-celled life appears.

While the planet itself is billions of years old, most of the complex life and recorded history we study occurred in the final few "minutes" of its existence. how old is earth

The Earth is approximately , with a margin of error of about 50 million years (roughly 1%). How we know To make that massive number easier to visualize,