USKINGS - Old Events - April 25, 2018 - Bell Labs Demonstrates the First Practical Silicon Solar Cell in 1954
(uskings.us) Solar cells, which convert sunlight into electrical current, had their beginnings more than a hundred years ago, though early solar cells were too inefficient to be of much use. In April, 1954, researchers at Bell Laboratories demonstrated the first practical silicon solar cell.
USKINGS - Old Events - April 15, 2018 - Ray Kroc opens first McDonald's Inc. fast food restaurant in Des Plaines, Illinois in 1955
(UsKings.org) McDonald's is an American fast food company, founded in 1940 as a restaurant operated by Richard and Maurice McDonald, in San Bernardino, California, United States.