100 Things to Know About the Unknown

What is dark matter? How fast could a T. rex run? How did Mary Queen of Scots keep her dying wishes secret from her enemies?

Scientists and historians have discovered a lot about our past, our future and how the world works, but SO MUCH remains unknown. This exciting information book filled with 100 fascinating and mind-blowing facts explores the edges of human knowledge and the vast world of science just waiting to be uncovered.