History puzzle · July 11, 2026

20th-century firsts

The tightly-packed century

Difficulty ★★★★★ · 10 events

In Hand of History for July 11, 2026 you place these 10 real events back into the order they happened. Here they are in chronological order, with the date revealed and why each one matters.

1924

U.S. Army Air Service pilots become the first to fly around the entire world.

Four planes set out from Seattle; only two make it back — one is named the 'Chicago' and is still on display in Washington, D.C.

The first aerial circumnavigation of the Earth proved that aircraft could link every corner of the globe.

1926

Robert Goddard launches the world's first liquid-fueled rocket from his aunt Effie's farm in Auburn, Massachusetts.

The entire flight lasts just 2.5 seconds and reaches a maximum altitude of about 41 feet — roughly the height of a four-story building.

Robert Goddard's successful launch of the first liquid-fueled rocket proved that controlled rocketry was possible, laying the groundwork for the Space Age.

First FIFA World Cup kicks off — 1930
1930

Uruguay hosts the first FIFA World Cup, with 13 nations competing.

The European teams arrive by boat — a three-week voyage — and several nations refuse to come at all, leaving just four European sides in the draw.

The 1930 FIFA World Cup was the first FIFA World Cup, the world championship for men's national football teams. It took place in Uruguay from 13 to 30 July 1930. FIFA, football's international governing body, selected Uruguay as the host nation, as the country would be celebrating the centenary of its first constitution and the Uruguay national football team had retained their football title at the 1928 Summer Olympics. All matches were played in the Uruguayan capital, Montevideo, the majority at the purpose built Estadio Centenario.

📷 Wikimedia Commons

First artificial nuclear chain reaction achieved — 1942
1942

Enrico Fermi's team achieves the first self-sustaining nuclear chain reaction beneath the stands of Stagg Field in Chicago.

The reactor — Chicago Pile-1 — has no radiation shielding whatsoever; the main safety device is a man standing on the pile ready to pour in a bucket of cadmium-sulphate solution.

Chicago Pile-1 (CP-1) was the first artificial nuclear reactor. On 2 December 1942, the first human-made self-sustaining nuclear chain reaction was initiated in CP-1 during an experiment led by Enrico Fermi. The secret development of the reactor was the first major technical achievement for the Manhattan Project, the Allied effort to create nuclear weapons during World War II. Developed by the Metallurgical Laboratory at the University of Chicago, CP-1 was built under the west viewing stands of the original Stagg Field. Although the project's civilian and military leaders had misgivings about the possibility of a disastrous runaway reaction, they trusted Fermi's safety calculations and decided they could carry out the experiment in a densely populated area. Fermi described the reactor as "a crude pile of black bricks and wooden timbers".

📷 Wikimedia Commons

World's first stored-program computer runs — 1948
1948

The Manchester Baby — the world's first stored-program computer — runs its first program at the University of Manchester.

The program's sole purpose is to find the highest factor of a number, and it takes 52 minutes to do arithmetic that a 10-year-old could finish in seconds.

The Manchester Baby, also called the Small-Scale Experimental Machine (SSEM), was the first electronic stored-program computer. It was built at the Victoria University of Manchester by Frederic C. Williams, Tom Kilburn, and Geoff Tootill, and ran its first program on 21 June 1948.

📷 Wikimedia Commons

1950

Frank McNamara launches the Diners Club card — the world's first multipurpose charge card.

The idea reportedly comes to McNamara after he leaves his wallet at home at a restaurant and has to phone his wife to bring cash — though the card is made of cardboard, not plastic.

Diners Club International Ltd. (DCI), founded as Diners Club, is a charge card company owned by Capital One. Formed in 1950 by Frank X. McNamara, Ralph Schneider (1909–1964), Matty Simmons, and Alfred S. Bloomingdale, it was the first independent payment card company in the world, successfully establishing the financial card service of issuing travel and entertainment (T&E) credit cards as a viable business. Diners Club International and its franchises serve members globally, with acceptance in over 200 countries and territories. As of 2024–2025, the network includes more than 55 card issuers operating in approximately 45 countries.

US detonates the first hydrogen bomb — 1952
1952

The United States detonates Ivy Mike, the world's first hydrogen bomb, on Enewetak Atoll in the Pacific.

The device is so large it fills an entire building — it weighs about 82 tonnes and could never actually be delivered by any aircraft then in service.

Ivy Mike was the codename given to the first full-scale test of a thermonuclear device, in which a significant fraction of the explosive yield comes from nuclear fusion. Ivy Mike was detonated on November 1, 1952, by the United States on the island of Elugelab in Enewetak Atoll, in the now independent island nation of the Marshall Islands, as part of Operation Ivy. It was the first full test of the Teller–Ulam design, a staged fusion device.

📷 Wikimedia Commons

Hillary and Tenzing summit Mount Everest — 1953
1953

Edmund Hillary and Tenzing Norgay become the first climbers confirmed to reach the summit of Mount Everest.

Hillary takes a photo of Tenzing on the summit, but Tenzing never photographs Hillary — because Tenzing has never used a camera before in his life.

The 1953 British Mount Everest expedition was the ninth mountaineering expedition to attempt the first ascent of Mount Everest, and the first confirmed to have succeeded when Tenzing Norgay and Edmund Hillary reached the summit on 29 May 1953 at 11:30 a.m. Led by Colonel John Hunt, it was organised and financed by the Joint Himalayan Committee. News of the expedition's success reached London in time to be released on the morning of Queen Elizabeth II's coronation, on 2 June that year.

📷 Wikimedia Commons

1954

Surgeons Joseph Murray and J. Hartwell Harrison perform the world's first successful kidney transplant at Peter Bent Brigham Hospital in Boston.

The donor and recipient are identical twins — a deliberate choice, since the team knew rejection would destroy any other attempt and wanted proof the surgery itself could work.

The first successful kidney transplant proves that human organs can be transferred between people, founding transplant medicine.

First nuclear power station opens — 1956
1956

Queen Elizabeth II opens Calder Hall in Cumberland, the world's first full-scale nuclear power station to supply a public electricity grid.

The plant's primary purpose is actually to produce plutonium for Britain's nuclear weapons programme — the power generation is almost a convenient side-effect.

Calder Hall Nuclear Power Station is a former Magnox nuclear power station on the Sellafield site in Cumbria in North West England. Calder Hall was the first full-scale nuclear power station to enter operation in the West, and was the sister plant to the Chapelcross plant in Scotland. Both were commissioned and originally operated by the United Kingdom Atomic Energy Authority. The primary purpose of both plants was to produce weapons-grade plutonium for the UK's nuclear weapons programme, but they also generated electrical power for the National Grid.

📷 Wikimedia Commons

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