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Scientists are always spouting information about the ages of rocks and fossils. Well, they figure it out using two different methods: relative dating and numerical dating.

Let's find out more about these geological dating methods in order to understand how Paul the Paleontologist can be so sure about the age of his dinosaur fossils.

In 1905, Ernest Rutherford figured out that we could use radiation to establish the ages of rocks.

By studying how the mass of uranium changed with radioactive decay, Rutherford was able to determine the age of a rock containing a uranium mineral. It meant that scientists could suddenly establish the actual ages of all their rocks and fossils!

Free 5-day trial Learn how scientists determine the ages of rocks and fossils.

We'll explore both relative and numerical dating on our quest to understand the process of geological dating.

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And, what about other findings like fossil fish, plants and insects?

The first method that scientists use to determine the age of rocks is relative dating.

In this method, scientists compare different layers of rock to determine an ordered sequence of events in geologic history.

He could be pretty confident that his super awesome dinosaur was about 175 million years old.

Stratigraphic and fossil succession are good tools for studying the relative dates of events in Earth's history, but they do not help with numerical dating.