For years, the rock sat in the school’s student foyer ... They made the tracks during the Early Jurassic while walking on moist, silty clay that was covered by a thin layer of water.

At 2.5 billion years old and weighing in at 2.5 tonnes ... They allow scientists to research the early atmosphere of our planet and the process of rock formation. 'Banded iron formations are also an ...

There are three main types of rock, with rocks changing between each type over millions of years. This rock recycling is a process called the rock cycle. The Earth's rocks are constantly changing.