A graphic novel following the BATS--Bea, Archie, Trudy, and Spence--across the world as they explore bridges of all kinds--beam, arch, suspension, and truss, all ancient and modern. The engineering-minded kids learn all about the physical forces threatening to topple bridges at all times, and how engineers design bridges to be both good to look at and strong enough to withstand those forces. Teaching Books: https://www.teachingbooks.net/tb.cgi?tid=82037.

Series subtitle: Get to know your universe!