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4 days ago · The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...
2 days ago · At that time, Uranus, Neptune, nor the asteroid belts have been discovered yet. Discovery and exploration of the Solar System is observation, visitation, and increase in knowledge and understanding of Earth 's "cosmic neighborhood". [1] This includes the Sun, Earth and the Moon, the major planets Mercury, Venus, Mars, Jupiter, Saturn, Uranus ...
3 days ago · PCBs are organochlorine compounds with the formula C 12 H 10−x Cl x; they were once widely used in the manufacture of carbonless copy paper, as heat transfer fluids, and as dielectric and coolant fluids for electrical equipment. [2] Because of their longevity, PCBs are still widely in use, even though their manufacture has declined ...
May 3, 2024 · Further linguistic analysis indicated that people arrived in the Americas in four distinct waves. The first occurred around 24,000 years ago, when massive glaciers covered much of North America.
May 1, 2024 · Rhodesia, c. 1902. Map of Central Africa, showing most of Rhodesia (part of which is now Zimbabwe) from the 10th edition of the Encyclopædia Britannica, published in 1902. (more) By 1892 about 1,500 settlers from the south had arrived in Rhodesia. The railway reached Bulawayo in 1896 and Victoria Falls in 1904.
May 10, 2024 · The northern lights have fascinated mankind since at least 957 B.C., more than 2,000 years before Galileo coined the term "aurora borealis."
May 2, 2024 · Antonie van Leeuwenhoek (born October 24, 1632, Delft, Netherlands—died August 26, 1723, Delft) was a Dutch microscopist who was the first to observe bacteria and protozoa. His researches on lower animals refuted the doctrine of spontaneous generation , and his observations helped lay the foundations for the sciences of bacteriology and ...
