ISLA: Look at the shape of this rock, Connor! CONNOR: Good find! That’s a ripple mark left by water that used to sit on top of this before it was rock. This used to be sand and other sediment - that's ...

In the following days, we will examine the three different types of rocks and how they are formed, what they tell us about the earth, and where you can find them. We’ll also take a closer look at some ...

Deep below the Tyrrhenian Sea offshore Italy, scientists drilled into what they thought would be dark mantle rock—and found ...