Everything around us is measured with numbers: With very, very small numbers when we measure the baby of a shrimp and with very large numbers when we measure our solar system. Do you sometimes wonder... How many times per hour does a bear's heart beat? How many kilometers do you need to travel to reach the moon and return? And how many to go to Saturn? How far are the clouds? What happens when you keep adding zeros to the end of a number? In this book, you will find all the answers!