Desert Oak is a tree that is found in Australia. It grows almost as tall as your classroom wall. It has very few leaves. Its roots go down the length of about 30 such trees laid down in a line end to end, one after another. These roots go deep into the ground till they reach water. This water is stored in the tree trunk. Local people knew about this. When there was no water in the desert, the local people use to put a thin pipe into the trunk of the tree, to drink this water.