Nuclear weapons are very powerful and dangerous devices that release huge amounts of energy. Since they were first developed, these weapons have played a big role in global military strategies. The story began in World War II, when scientists discovered how to split atoms, which led to the creation of atomic bombs in the U.S. through the Manhattan Project. In 1945, these bombs were tested and later dropped on Hiroshima and Nagasaki, ending the war but showing the world the frightening power of nuclear weapons.
After the war, other countries like the Soviet Union, the UK, France, and China started making their own nuclear weapons. There are two main types: atomic bombs (using fission) and hydrogen bombs (which are even stronger and use both fission and fusion). Testing these weapons caused a lot of fear about nuclear fallout, which spreads dangerous radiation over large areas. While having nuclear weapons gives countries strong Military power, it also brings great risks. Because of this, many treaties have been made to try to reduce and control the number of weapons.
One prominent theory suggests that much of Earth's water was delivered by comets and asteroids during the early stages of the solar system's formation. These icy bodies collided with the young Earth, bringing water and other volatile compounds.
Water vapor and other volatiles were released from the Earth's interior through volcanic activity, gradually accumulating in the atmosphere and eventually condensing to form oceans.
A significant portion of Earth's water may have originated from interstellar clouds or through chemical reactions on the surface of grains in space, which later accreted to form the planet.
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