Do you know why blue-footed boobies have blue feet? Author Laura Erickson does, and you’ll find the answers to this and many other great questions in her book, The Bird Watching Answer Book. (For the ...

The film discusses the principles of aerodynamics, focusing on the behavior of air as it interacts with different shapes and ...

Flying wing bombers nearly entered service during WWII and soon after, however, they would become reality until the B-2 in ...