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HOW?
HOW?
Table of Contents
How do horses sleep? 4
How big were dinosaurs? 6
How long ago did dinosaurs live? 7
How did people tell time before there were clocks? 8
How do fish breathe underwater? 10
How deep is the ocean? 11
How can a camel live in the desert? 12
How does a snake move without legs? 13
How does an airplane f ly? 14
How do people steer a hot air balloon? 15
How does a sea otter eat? 16
How high can a kangaroo jump? 18
How does a roller coaster stay on the track? 20
How do elephants use their trunks? 22
How fast can a cheetah run? 23
How much can people learn? 24
