Lamichhane, Priyanka

"Trains have been around for more than two centuries. They changed the entire world. This encyclopedia gives readers a look at trains, from the first steam-powered locomotive to high-tech maglev trains"--Publisher.

"Digestion starts the minute you put food or a drink in your mouth. And by the time the process ends, your body has taken every bit of nutrition possible from your food. Did you know that the average person produces enough saliva in one year to fill a bathtub? Or that the small intestine is the longest part of the digestive system? Learn all this and more in [this book]"--Provided by publisher.

"Planes carry people and items around the world. They are used by the military, by the postal service, and for fun! This encyclopedia gives readers a look into the history of planes, from the first flight to military machines to futuristic fliers"--Publisher.