Scientists tell us that 99.99% of ALL animal and plant species that have ever existed ARE NOW EXTINCT. What does 'extinct' mean and why does it happen? This book looks at the strange and very different kinds of animals that have walked the planet and which we will never see.
This book explores the energy produced by the wind and moving air generally to power machines such as the windmill and wind turbine, and to help people and objects travel both at speed and more slowly through the air. It also looks at the way chemical energy can be stored and used and examines the contribution made by the famous inventor of the dynamo, Michael Faraday.
This book explores the simple machines that help reduce effort, that help lift or move loads or speed up work. Useful machines such as the wheelbarrow, crane and plow use levers, pulleys and wheels and axles, while the screw and rudder can help change the direction of moving water. The book also examines the contribution made in the 1400's by the famous Italian inventor, Leonardo da Vinci.
Leo is a genius. His pet cat named Pallas is not! But together they come up with some brilliant inventions. Full of brainy ideas and way ahead of his (Stone Age time, Leo tackles inventions that will change the way people live and work for hundreds of years to come. STEM (Science, Technology, Engineering and Maths) forms an important focus of learning in schools worldwide.
A series for the young architect, designer or archeologist who wants to unearth the wonderful cities and dwellings of the past and learn how ancient builders worked.