Do you know how many zeros there are in a duotrigintillion? Or which country has the greatest number of smartphones? Have you ever heard of the 'curiosity gap'? And do you know how fast the speediest passenger zooms over the tracks? Discover the answers to all these and much, more more in Big Countdown: Technology.

The Big Countdown looks at popular topics and investigates the great many numbers that make them fascinating. 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. Ideal reading for number-crunchers aged 9 and up.

 

This book is part of a book series called The Big Countdown .

This book has been graded for interest at 9-11 years.

There are 32 pages in this book. This is a dictionary/encyclopedia. This book was published 2018 by Hachette Children's Group .

Paul Mason is an experienced freelance writer and editor of a variety of children's information books.

This book has the following chapters:

• 1: Counting down technology
• 2: 2, 080, 240, 700, 000 Google searches a year (at least)
• 3: 132, 763, 000, 000 TOE of energy used by the world each year
• 4: 6, 100, 000, 000 smartphones in use by 2020
• 5: 3, 696, 000, 000 passengers carried by plane in a year
• 6: 300, 000, 000 m of steel wire in the Akashi Kaikyo Bridge
• 7: 75, 000, 000 bytes in a song
• 8: 20, 000 gauss magnet in the most powerful MRI scanners
• 9: 900% increase in clicks because of the curiosity gap
• 10: 430 kph speed of the fastest passenger train
• 11: 134 months to do a (robot) marathon on Mars
• 12: 22 gears on a modern racing bike
• 13: 1 International Space Station