Watch B-52H Stratofortress bomber flying over the Mojave Desert, California

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Learn about mining and refining copper from Chile's Atacama Desert.

Encyclopædia Britannica, Inc.

Johannes Gutenberg developed one of the first printing presses in the mid-1400s.

Media Editor: Lauren Sims

© American Chemical Society (A Britannica Publishing Partner)

Learn about the development and applications of glass paint, which is made of silica glass and formulated to reflect sunlight, protecting surfaces from heat and damage.

NASA/Dryden Research Aircraft Movie Collection

Testing in 1953 of the B-47A Stratojet, a version of the swept-wing bomber built by the Boeing Company. B-47s formed the core of the U.S. Air Force's Strategic Air Command (SAC) during the 1950s and early '60s.

NASA/Dryden Research Aircraft Movie Collection

An X-15 rocket-powered research aircraft launching from a U.S. Air Force B-52, c. 1960s.

NASA/Dryden Research Aircraft Movie Collection

U.S. Navy F-14 Tomcat undergoing a spin test at NASA's Dryden Flight Research Center at Edwards Air Force Base in California, c. 1980.

NASA/Dryden Research Aircraft Movie Collection

A U.S. Air Force KC-135A Stratotanker taking off during a test of experimental winglets, mid-1970s.