"Screen Saver" -- The Discovery Files

Chemists have found a cheaper way to light up smartphone and TV screens -- using copper rather than iridium -- which could save manufacturers and consumers money without affecting visual quality. Iridium is one of the rarest elements on Earth, its origins possibly a millions-year-old asteroid; copper, on the other hand, is a plentiful metal worldwide. Therefore, substituting copper for iridium could help solve a major supply problem.

Source: The Discovery Files - March 4, 2019 Category: Science Authors: National Science Foundation Source Type: podcasts