On This Day in History
Discover key historical events within the Genesis range (1950–2049) that occurred on this calendar day, and claim their commemorative registry plaques.
December 20
8 historical milestones registered between 1950 and 2049
Experimental Breeder Reactor I near Arco, Idaho, U.S., became the world's first electricity-generating nuclear power plant when it became able to illuminate four 200-watt light bulbs.
Wikipedia: Experimental Breeder Reactor INBC aired the American football match between the New York Jets and the Miami Dolphins without announcers.
Wikipedia: NBCTwelve-year-old Jonelle Matthews disappeared from her home in Greeley, Colorado; her body was not discovered until 2019.
Wikipedia: Murder of Jonelle Matthews
The deadliest peacetime maritime disaster in history occurred when the MV Doña Paz (pictured) sank after colliding with an oil tanker in the Tablas Strait in the Philippines, resulting in an estimated 4,385 deaths.
Wikipedia: List of maritime disastersMandated by the Dayton Agreement that ended the Bosnian War, the NATO-led Implementation Force (troops pictured) began peacekeeping operations in Bosnia and Herzegovina.
Wikipedia: Dayton AgreementAmerican Airlines Flight 965 crashed into a mountain in Buga, Colombia, killing 159 of the 163 people on board.
Wikipedia: American Airlines Flight 965Portugal transferred the sovereignty over Macau, which it had administered since the mid–16th century, to China.
Wikipedia: Handover of MacauPablo Picasso's Portrait of Suzanne Bloch was stolen from the São Paulo Museum of Art before being recovered about three weeks later.
Wikipedia: Pablo Picasso