Did you know that a blue whale weighs about as much as 20 T-Rex dinosaurs? Or that a guinea pig is 70% water? This exciting picture book is full of these and many more fascinating fact nuggets.

Turn the pages and compare the fastest machines, the tallest buildings, the biggest animals, the world's highest fliers and much, much more. You can trace the journey lines to discover which animal travels furthest, read the clues to match the fossil print to the dinosaur, or count up the construction workers to see how many humans it takes to measure the height of a mighty tunnelling machine.