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  2. Silicon - Wikipedia

    en.wikipedia.org/wiki/Silicon

    Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, ... Jöns Jacob Berzelius discovered silicon in 1823. In 1787, ...

  3. Discovery of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Discovery_of_chemical_elements

    Perey discovered it as a decay product of 227 Ac. [177] Francium was the last element to be discovered in nature, rather than synthesized in the lab, although four of the "synthetic" elements that were discovered later (plutonium, neptunium, astatine, and promethium) were eventually found in trace amounts in nature as well. [178]

  4. Jöns Jacob Berzelius - Wikipedia

    en.wikipedia.org/wiki/Jöns_Jacob_Berzelius

    Berzelius is credited with discovering the chemical elements cerium and selenium and with being the first to isolate silicon, thorium, titanium and zirconium. Berzelius discovered cerium in 1803 [29] and selenium in 1817. [30] Berzelius also discovered how to isolate silicon in 1824, [31] and thorium in 1824.

  5. Timeline of scientific discoveries - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_scientific...

    The following dates are approximations. 700 BC: Pythagoras's theorem is discovered by Baudhayana in the Hindu Shulba Sutras in Upanishadic India. [18] However, Indian mathematics, especially North Indian mathematics, generally did not have a tradition of communicating proofs, and it is not fully certain that Baudhayana or Apastamba knew of a proof.

  6. History of chemistry - Wikipedia

    en.wikipedia.org/wiki/History_of_chemistry

    A 100,000-year-old ochre-processing workshop was found at Blombos Cave in South Africa. It indicates that early humans had an elementary knowledge of mineral processing. Paintings drawn by early humans consisting of early humans mixing animal blood with other liquids found on cave walls also indicate a small knowledge of chemistry. [3] [4]

  7. Where in Northern California is most at risk for tsunami ...

    www.aol.com/news/where-northern-california-most...

    (A list of Southern California locations most at risk for flooding from a tsunami can be found here.) Read more:Memories of 1964 Tsunami Are Still Vivid. ... Near Silicon Valley .

  8. Timeline of historic inventions - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_historic...

    The earliest pipes were made of clay, and are found at the Temple of Bel at Nippur in Babylonia. [126] [b] 4000 BC: Oldest evidence of locks, the earliest example discovered in the ruins of Nineveh, the capital of ancient Assyria. [129] 4000 BC – 3400 BC: Oldest evidence of wheels, found in the countries of Ukraine, Poland, and Germany. [130 ...

  9. Officials probing fiery Tesla crash that killed 4 people in ...

    www.aol.com/officials-probing-fiery-tesla-crash...

    Police in western France say they're looking into what caused a Tesla that came off a road to catch on fire in a crash that killed the driver and all 3 passengers.