1803day.year

British scientist John Dalton begins using symbols to represent the atoms of different elements.

In 1803, John Dalton introduced a system of symbols to represent chemical atoms, laying groundwork for modern atomic theory.
John Dalton first published his atomic symbols in 1803 as part of his pioneering work in chemistry. Each element was assigned a unique symbol to visualize atomic relationships. Dalton’s system accompanied his broader atomic theory, proposing that matter is composed of discrete atoms. These ideas were outlined in his book 'A New System of Chemical Philosophy'. The symbolic notation allowed chemists to better communicate and balance chemical equations. Dalton’s contributions became foundational to modern chemical science.
1803 John Dalton
1915day.year

World War I: The first tank prototype, developed by William Foster & Co. for the British army, was completed and given its first test drive.

Britain’s first tracked tank prototype, dubbed “Little Willie,” is completed and undergoes its maiden test drive.
Developed by William Foster & Co. under the British Landship Committee, the prototype tank nicknamed 'Little Willie' was finished and first tested on September 6, 1915, near Lincoln, England. Designed to cross trenches and support infantry on the Western Front, 'Little Willie' featured caterpillar tracks and armored plating but struggled with steering and trench-crossing. Despite its limitations, the vehicle represented a revolutionary step in mechanized warfare. Further refinements led to the more practical Mark I tank, which debuted in battle later that year. This innovation would reshape military tactics and herald the era of armored warfare.
1915 first tank William Foster & Co.
1962day.year

Archaeologist Peter Marsden discovers the first of the Blackfriars Ships dating back to the second century AD in the Blackfriars area of the banks of the River Thames in London.

Archaeologist Peter Marsden discovers the first of the Blackfriars Ships dating to the 2nd century AD in London.
On September 6, 1962, British archaeologist Peter Marsden uncovered the first of the Roman-era Blackfriars Ships along the northern bank of the River Thames in London. Dating back to the second century AD, these well-preserved timber vessels provided unprecedented insights into early Roman riverine transport and shipbuilding techniques. The find revealed construction methods featuring oak planking and elm frames, shedding light on trade networks within Roman Britain. Archaeologists employed innovative waterlogged-site excavation methods to document the fragile remains. Subsequent discoveries of additional ship sections transformed understanding of urban development along the Thames. The Blackfriars Ships have since been featured in major museum exhibits, captivating scholars and the public alike. Their discovery underscored the rich archaeological potential beneath London's modern cityscape.
Blackfriars Ships Blackfriars River Thames
1976day.year

Cold War: Soviet Air Defence Forces pilot Viktor Belenko lands a Mikoyan-Gurevich MiG-25 jet fighter at Hakodate in Japan and requests political asylum in the United States; his request is granted.

On September 6, 1976, Soviet pilot Viktor Belenko defected by flying his MiG-25 Foxbat to Hakodate, Japan, and sought asylum in the United States. His defection granted the West unprecedented access to Soviet jet technology.
Captain Viktor Belenko deviated from his flight path over Siberia and landed his MiG-25 at Hakodate Airport in northern Japan. Japanese officials were astonished by the arrival of the supersonic fighter and immediately secured the site. Belenko disassembled critical components of the MiG-25, allowing U.S. analysts to examine its radar and engines. He formally applied for political asylum, citing disillusionment with Soviet authority and yearning for freedom. The U.S. granted his request, relocating Belenko under CIA protection to California. Analysis of the MiG-25 revealed that its performance fell short of Western intelligence estimates. This incident embarrassed the Soviet military and reshaped Cold War aerial defense strategies.
1976 Cold War Soviet Air Defence Forces Viktor Belenko Mikoyan-Gurevich MiG-25 Hakodate political asylum