August 15

Events - Science & Technology

1977day.year

The Big Ear, a radio telescope operated by Ohio State University as part of the SETI project, receives a radio signal from deep space; the event is named the "Wow! signal" from the notation made by a volunteer on the project.

The Big Ear radio telescope detected the mysterious 'Wow! signal,' a brief but powerful radio burst from deep space, sparking excitement in the search for extraterrestrial intelligence.
On August 15, 1977, the Big Ear radio telescope at Ohio State University recorded an intense, narrowband radio signal from the direction of Sagittarius. Astronomy volunteer Jerry Ehman was so struck by the anomaly that he circled the data and wrote 'Wow!' beside it, giving the event its name. The signal, lasting just 72 seconds, matched expectations for an extraterrestrial transmission but was never detected again. Despite numerous follow-up searches, no conclusive explanation has emerged for the Wow! signal. It remains one of the most intriguing and debated events in the history of the Search for Extraterrestrial Intelligence (SETI).
1977 The Big Ear radio telescope Ohio State University SETI Wow! signal
1998day.year

Apple introduces the iMac computer.

Apple unveiled the first iMac G3 in 1998, revolutionizing personal computers with its colorful design and USB connectivity.
On August 15, 1998, Apple, under CEO Steve Jobs, launched the iMac G3, marking a dramatic comeback for the struggling company. Featuring a translucent Bondi Blue shell and all-in-one design, the iMac broke from conventional beige PCs. It was one of the first major personal computers to adopt USB ports exclusively, eliminating legacy connectors. The G3’s emphasis on simplicity, style, and internet readiness appealed to consumers and educators alike. With strong sales, the iMac played a pivotal role in revitalizing Apple’s brand and setting the stage for its future product lines.
Apple iMac
2020day.year

Russia begins production on the Sputnik V COVID-19 vaccine.

On August 15, 2020, Russia commenced mass production of the Sputnik V COVID-19 vaccine developed by the Gamaleya Center. The effort aimed to meet both domestic demand and international orders amid the global pandemic.
On August 15, 2020, Russian authorities announced the start of mass production for Sputnik V, the nation's adenovirus-based COVID-19 vaccine developed by the Gamaleya Research Institute. First registered in early August, Sputnik V was the world's first officially approved coronavirus vaccine. Russian manufacturers pledged to produce millions of doses by the end of the month to distribute domestically and abroad. The announcement sparked global debate over vaccine development speed, regulatory transparency, and efficacy data. Several countries placed orders for Sputnik V, while others awaited further clinical trial results. Russia promoted the vaccine as a triumph of its scientific capability and an instrument of health diplomacy. International health agencies later reviewed the vaccine's trial outcomes to assess its safety and effectiveness.
2020 Sputnik V COVID-19 vaccine