How big is a hydrogen atom? What is the speed limit of the universe? How does a computer tell time? Learn all about length, area, volume, and speed--and how we use them to measure the world around us--all in the pages of this book.

When did humans first start counting? Is infinity really a number? Learn all about numbers big and small--and how we use them to describe the world around us--all in the pages of this book.

How did the Egyptians write fractions? How do you make a snowflake out of triangles? How do banks keep our money safe? Learn all about fractions, factorials, combinations, and fractals--and how we use math to break the world into bits--all in the pages of this book.

What are the chances of winning the lottery? How do you find the mean? Learn all about probability, averages, and ratios--and see how to calculate the odds--all in the pages of this book.

What shape do bees build with? How do you flatten a pyramid? Why is a polar bear so big? Learn all about two- and three-dimensional objects--and how they fit together to make the world around us--all in the pages of this book.