Answer:
We use special tools and chemicals to help us see how long and how old the dirt or soil is, and or new technology!
Explanation:
First of all, lets say you found a weird rock that you have never seen before.
It was brown with white spots, and had a name carved into it! You take it to your house and search up the name that is carved on the rock! You found a old rock that a long lost Indian tribe had used for marking the dead!
