There are lots of types of rock and each type has different properties and uses. For example, some are strong and hard but others are soft and sandy. Some rocks are harder than others. For example ...

The characteristics of the rocks that hold fossils can be as informative as the fossils themselves. There are three main types of rock: igneous rock, metamorphic rock, and sedimentary rock. Almost all ...

In the experiment, the team introduced new types of rock to the animals. These rocks were unfamiliar to the chimpanzees, who ...

Just before the spring equinox, a friend and I went out on the Fish Creek Trail one morning on a low tide. We saw five or six ...