Do you know how fast a space rocket blasts through the sky? Or how deep under the sea submarines have ventured? How about the number of electric cars on the road? Or the top speed of NASA's crawler transporter (hint - it's not very fast!) Discover the answers to all these questions and much more in this book. From the mind-bogglingly large to smallest and most precious, this series helps us understand that it's not just our days that are numbered.