Learn all about the water cycle and find out how water shapes our planet. Make a precipitation gauge or grow your own stalactite. Find out how important it is to conserve water and harness its energy.

This series takes a cross-disciplinary approach to science, exploring natural elements in our world through stories, culture, history and art - as well as the science behind each topic. Explore, Create and Investigate through experiments, activities and hands-on tasks. What on Earth? takes the reader on a journey of discovery to explore the natural elements of our world.

Isabel Thomas studied Human Sciences at Oxford University, trained as a journalist and explored the world before becoming an author. She has written more than 100 titles, from picture books to encyclopedias.

Paulina Morgan works as an independent illustrator based in Santiago de Chile. She studied design before moving to Barcelona, Spain to obtain her master's degree in Art Direction. She worked in advertising before deciding to pursue her passion for illustration.