Alexander the Great

Alexander III of Macedon (20/21 July 356 BC – 10/11 June 323 BC), commonly known as Alexander the Great (Greek: Ἀλέξανδρος ὁ Μέγας, Aléxandros ho Mégas Koine Greek: [a.lék.san.dros ho mé.gas]), was a king (basileus) of the Ancient Greek kingdom of Macedon and a member of the Argead dynasty. Continue reading

First National geologic survey

Undertaking of the project began in 1835, called Geological Survey of Great Britain, under the direction of Henry Thomas De la Beche, an economic geologist. Continue reading

Albert Einstein

Albert Einstein (/ˈaɪnstaɪn/; German: [ˈalbɛɐ̯t ˈaɪnʃtaɪn]; 14 March 1879 – 18 April 1955) was a German-born theoretical physicist. He developed the theory of relativity, one of the two pillars of modern physics (alongside quantum mechanics). Einstein’s work is also known for its influence on the philosophy of science. Einstein is best known by the general public for his mass–energy equivalence formula E = mc2 (which has been dubbed “the world’s most famous equation”). He received the 1921 Nobel Prize in Physics “for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect”, a pivotal step in the evolution of quantum theory.

Near the beginning of his career, Einstein thought that Newtonian mechanics was no longer enough to reconcile the laws of classical mechanics with the laws of the electromagnetic field. This led him to develop his special theory of relativity during his time at the Swiss Patent Office in Bern (1902–1909), Switzerland. He realized, however, that the principle of relativity could also be extended to gravitational fields, and with his subsequent theory of gravitation in 1916, he published a paper on general relativity. He continued to deal with problems of statistical mechanics and quantum theory, which led to his explanations of particle theory and the motion of molecules. He also investigated the thermal properties of light which laid the foundation of the photon theory of light. In 1917, Einstein applied the general theory of relativity to model the large-scale structure of the universe.

More at: Albert Einstein – Wikipedia

Albert Einstein

      Albert Einstein
      Theoretical Physicist
      March 14, 1879, Ulm, Germany
      April 18, 1955, Princeton, New Jersey, United States
      Elsa Einstein (m. 1919–1936), Mileva Marić (m. 1903–1919)
      Eduard Einstein, Lieserl Einstein, Hans Albert Einstein

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Imagination is more important than knowledge.

The important thing is not to stop questioning. Curiosity has its own reason for existing.

Anyone who has never made a mistake has never tried anything new.

Try not to become a man of success, but rather try to become a man of value.

Two things are infinite: the universe and human stupidity; and I’m not sure about the universe.

Science without religion is lame, religion without science is blind.

No problem can be solved from the same level of consciousness that created it.

Everything should be made as simple as possible, but not simpler.

The most beautiful thing we can experience is the mysterious. It is the source of all true art and science.

I have no special talents. I am only passionately curious.

Additional Information:

Scientific proof of the general theory of relativity

Scientific proof of the general theory of relativity was obtained during the total eclipse of the sun in 1919. Continue reading

First time scientists were attached to armed forces

Thats right, botanists, zoologists, geologists, geographers, and physicians were the kinds of scientists that accompanied the armies of Alexander the Great on his campaigns of military conquest beginning in 335 BCE. Continue reading

Anemometer for measuring air speed

Invented by English physicist Robert Hooke in 1644, his anemometer for measuring air speed device counted the turns of a horizontal bladed rotor exposed to the wind.
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First observation of a cell nucleus

The Scottish botanist Robert Brown made an observation of a cell nucleus in 1831, he noted the central body in the cells of the orchids of genuses Orchidaceae and Asclepiadaceae. He even called this structure the “nucleus” of the cell. Continue reading

Hideki Yukawa

He was born as Hideki Ogawa in Tokyo and grew up in Kyoto with two older brothers, two older sisters, and two younger brothers. Continue reading

Prediction of the existence of Mesons

Japanese physicist Yukawa Hideki was awarded the Nobel Prize in Physics in 1949. For his prediction of the existence of mesons that was made in 1935, during his lecturer at Osaka Imperial University in Osaka, Japan. He postulated a particle that mediated the strong interaction between nucleons (the particles of the atomic nucleus).

This particle, the “pi meson” or “pion”, was finally discovered in 1947.

Several other types of mesons of varying mass have been found; the first being observed in cosmic ray interactions in 1937 by American scientists.

      Yukawa Hideki

Additional Information:

  • Meson – Wikipedia
    In particle physics, mesons (/ˈmiːzɒnz/ or /ˈmɛzɒnz/) are hadronic subatomic particles composed of one quark and one antiquark, bound together by the strong interaction.
  • List of mesons – Wikipedia
    Mesons are unstable subatomic particles composed of one quark and one antiquark. They are part of the hadron particle family – particles made of quarks.
  • What’s the reason behind the existence of mesons? | Physics Forums …
    I’ve read that mesons consist of a quark and an antiquark. So, here’s my question. Why don’t the quark and the anti-quark annihilate with each other (like they ususally do)?
  • meson | subatomic particle |
    Meson, any member of a family of subatomic particles composed of a quark and an antiquark. Mesons are sensitive to the strong force, the fundamental interaction that binds the components of the nucleus by governing the behaviour of their constituent quarks.
  • Hadrons, baryons, mesons – HyperPhysics Concepts
    Mesons are intermediate mass particles which are made up of a quark-antiquark pair.

Map of the human genome

The Rudimentary detail by researchers under Daniel Cohen in 1993 at the centre for the Study of Human Polymorphism in Paris, France, prepared the map of the human genome. Continue reading