How old do scientists calculate the Earth
If we do not know we can not answer.
by studying artifacts found on earth
i don't know ask a scientist
beacuse.
I don't know, but scientist know.
willy
Its not like that there is no such things like that the human does not know this EVEN THE SCIENTIST does not know this
A geologist is a scientist that studies the Earth.
Radioactivity
Scientist study earth because earth is the place that we envolved on and is the only planet in our solar system that is know to support life and is the fifth- largest planet in our universe.
Scientists study layers of rocks to learn about the earth and how it has changed. They know that if layers are undisturbed, the oldest rocks are on the bottom and the youngest rocks are on top. They know how old each layer is in relation to the other layers.