December 20

Events - Science & Technology

1951day.year

The EBR-1 in Arco, Idaho becomes the first nuclear power plant to generate electricity. The electricity powered four light bulbs.

The EBR-1 reactor at Arco, Idaho became the first nuclear power plant to generate electricity for public use.
On December 20, 1951, the Experimental Breeder Reactor I (EBR-1) produced enough power to light four 200-watt bulbs in Arco, Idaho. Developed by Argonne National Laboratory, it demonstrated the feasibility of nuclear fission for electricity generation. EBR-1’s success marked a turning point in energy research, leading to civilian nuclear power plants worldwide. The site later became a museum showcasing early reactor technology. Arco, the world’s first nuclear-powered city, commemorated the event with a special festival. The achievement laid the groundwork for today’s diverse nuclear energy programs.
1951 EBR-1 Arco, Idaho nuclear power plant
1957day.year

The initial production version of the Boeing 707 makes its first flight.

The Boeing 707's first production flight on December 20, 1957, ushered in the jet age of commercial aviation.
On December 20, 1957, Boeing's first production 707 took off from Renton Field in Washington. This flight showcased the swept-wing design and powerful JT3 turbojet engines. It reached speeds around 630 miles per hour, far outpacing propeller-driven airliners of the era. The successful demonstration confirmed the model's reliability for long-range passenger service. Major airlines placed orders soon after, eager to modernize their fleets. This landmark event marked the dawn of the modern jet age and transformed global connectivity.
1957 Boeing 707