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Octopuses have three hearts — and nine brains!

Leo Tolstoy was a Russian writer and is best known for his epic novel "War and Peace," which was first published in 1869. The novel is widely considered one of the greatest works of world literature and explores the themes of war, peace, love, and family in 19th-century Russia.

According to a study at the University of Western Ontario found an average of about 17 reported laughs per day in adults, with a range of 0 to over 80 laughs. There were minimal to no differences between men and women in the average frequency of laughter. Keep in mind that this was a self-report method and therefore it may have underestimated the number of times adults actually did laugh... Which is kinda laughable.

The Titanic was a luxury ocean liner that sank on April 15, 1912, after hitting an iceberg during its maiden voyage from Southampton, England to New York City. The sinking resulted in the deaths of over 1,500 passengers and crew, making it one of the deadliest peacetime maritime disasters in modern history.

Jupiter is known to have 79 known moons, the most among all the planets in the solar system. Some of Jupiter's largest moons are Io, Europa, Ganymede and Callisto, which are known as the Galilean moons.