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The discoveries of elements radium and polonium were made by Polish chemist Marie Curie through the deep study of their nature and their compounds. Rhenium Rhenium, a d-block transition metal with Atomic number 75, was first isolated by Ida Noddack and her husband. The existence of this element was predicted by Dmitri Mendeleev. Ida Noddack was ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 24 February 2025. British X-ray crystallographer (1920–1958) This article is about the chemist. For the Mars rover named after her, see Rosalind Franklin (rover). Rosalind Franklin Franklin with a microscope in 1955 Born Rosalind Elsie Franklin (1920-07-25) 25 July 1920 Notting Hill, London, England ...
From the early 15th century to the early 17th century the Age of Discovery had, through Portuguese seafarers, and later, Spanish, Dutch, French and English, opened up southern Africa, the Americas (New World), Asia and Oceania to European eyes: Bartholomew Dias had sailed around the Cape of southern Africa in search of a trade route to India; Christopher Columbus, on four journeys across the ...
Rosalind Franklin joined King's College London in January 1951 to work on the crystallography of DNA. By the end of that year, she established two important facts: one is that phosphate groups, which are the molecular backbone for the nucleotide chains, lie on the outside (it was a general consensus at the time that they were at the inside); and the other is that DNA exists in two forms, a ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 23 January 2025. Leif Erikson (c. 970 – c. 1020) was a famous Norse explorer who is credited for being the first European to set foot on American soil. Explorers are listed below with their common names, countries of origin (modern and former), centuries of activity and main areas of exploration. Marco ...
Columbus before the Queen, imagined by Emanuel Gottlieb Leutze, 1843. This timeline of European exploration lists major geographic discoveries and other firsts credited to or involving Europeans during the Age of Discovery and the following centuries, between the years AD 1418 and 1957.
For their work the three received the Nobel Prize in Physics in 2004. 1974: The J/ψ meson was independently discovered by a group at the Stanford Linear Accelerator Center, headed by Burton Richter, and by a group at Brookhaven National Laboratory, headed by Samuel Ting of MIT. Both announced their discoveries on 11 November 1974.
1967: Vela nuclear test detection satellites discover the first gamma-ray burst 1970: James H. Ellis proposed the possibility of "non-secret encryption", more commonly termed public-key cryptography , a concept that would be implemented by his GCHQ colleague Clifford Cocks in 1973, in what would become known as the RSA algorithm, with key ...