Information on asbestos can be found at the Environmental Protection Agency’s asbestos information page.

The Energy Information Administration of the Department of Energy provides a summary of the origins and processing of crude oil.

Read about modern lost-wax casting methods at Artworks Foundry, one of the nation’s leading bronze foundries.

Read more about West African lost-wax casting and other West African art and craft techniques.

Find out more about the Daedalus project and other aircraft through NASA’s Dryden Flight Research Center.

The Raven Project is an ongoing project to build a human-powered aircraft designed to beat a number of world records.