Why did the Greeks themselves send lead for bullets during the revolution in one of the battles? Detailed answer

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Why did the Greeks themselves send lead for bullets during the revolution in one of the battles? Detailed answer

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Why did the Greeks themselves send lead for bullets during the revolution in one of the battles?

In 1821, the struggle of the Greeks for independence from the Ottoman Empire began. In one of the battles, the Greeks laid siege to the Acropolis. When the Turks began to run out of ammunition, they began to open the columns of the Parthenon, remove the lead fasteners from there and cut them into bullets. Upon learning of this, the Greeks themselves sent a batch of lead to the enemy, just to prevent the destruction of the monument.

Authors: Jimmy Wales, Larry Sanger

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Why did they put covers on piano legs in 19th century England?

In 19th-century Puritan England, anything that might seem the least bit erotic was carefully banished from public life. So, during concerts, covers were put on the legs of the pianos so that no one, looking at these bare legs, would think about something obscene.

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The fact that the universe is constantly expanding its boundaries has been known to scientists for a long time, but data from the Hubble space telescope, obtained back in the 1990s, indicate that the expansion of the universe is now happening much faster than in the distant past. This fact made a lot of noise at the time, forcing scientists to revise and rebuild all models of the universe. Calculations of the updated models suggested to physicists about the existence of some unknown energy in space, which is precisely responsible for accelerating the expansion of the Universe. This energy was called "dark energy" and now, several decades later, we have only a vague idea of its true nature.

One of the possible explanations for the phenomenon of dark energy is the assumption that this energy is some fifth fundamental force acting on matter along with the forces of gravity, electromagnetism, strong and weak nuclear interactions. And recently, a group of researchers at Imperial College London decided to test this theory thoroughly using a single-atom experiment.

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One of the strengths of this experiment is its simplicity. "It's quite unusual that we're able to learn something new about the structure of the universe using a setup that sits on a table in one of London's cellars," says Ed Hinds, professor in the Department of Physics at Imperial College London.

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