Katharine Hall

Polar bears and penguins may like cold weather but they live at opposite ends of the Eart...

There are many different kinds of clouds all around us. Clouds come in diverse shapes and...

Trees grow in many habitats, all around the world. Some trees are short and some are tall...

What makes a frog an amphibian but a snake a reptile? Both classes may lay eggs, but they...

All mammals share certain characteristics that set them apart from animal classes. But so...