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1778: Antoine Lavoisier (and Joseph Priestley): discovery of oxygen leading to end of Phlogiston theory. 1781: William Herschel announces discovery of Uranus, expanding the known boundaries of the Solar System for the first time in modern history.
Such discoveries are often a multi-step, multi-person process. Multiple discovery sometimes occurs when multiple research groups discover the same phenomenon at about the same time, and scientific priority is often disputed. The listings below include some of the most significant people and ideas by date of publication or experiment.
4000 BC: Probable time period of the first diamond-mines in the world, in Southern India. [124] 4000 BC: Paved roads, in and around the Mesopotamian city of Ur, Iraq. [125] 4000 BC: Plumbing. The earliest pipes were made of clay, and are found at the Temple of Bel at Nippur in Babylonia. [126] [b]
It was here, 100 years ago, that Edwin Hubble noted a light in the distance that would lead to one of science's greatest discoveries. By night, astronomers kept watch at the best telescopes on Earth.
This discovery was critical to the formulation of the Watson-Crick Model of DNA structure. Neil Bartlett mixes xenon and platinum hexafluoride leading to the first synthesis of a noble gas compound, xenon hexafluoroplatinate (1962). Robert Burns Woodward announces the total synthesis of Vitamin B-12 by a team he led (1973).
At the time, Coover and his team rejected the compound because it was incredibly sticky and had no use for gun sights. ... It led to one of the greatest discoveries in modern medicine, penicillin ...
1944 – Barbara McClintock breeds maize plants for color, which leads to the discovery of jumping genes. 1947 – John Bardeen and Walter Brattain fabricate the first working transistor. 1951 – Solomon Asch shows how group pressure can persuade an individual to conform to an obviously wrong opinion.
An image from John Dalton's A New System of Chemical Philosophy, the first modern explanation of atomic theory.. This timeline of chemistry lists important works, discoveries, ideas, inventions, and experiments that significantly changed humanity's understanding of the modern science known as chemistry, defined as the scientific study of the composition of matter and of its interactions.