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Apr 2, 1543
Nicolaus Copernicus theorized that Mars was a planet.
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Speculation that Mars has seas on it began.
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The idea that Mars may have living organisms on it began.
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The theory that about life on Mars was temporarily put to an end.
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Giovanni Schiaparell was the first to draw a map of Mars.
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Giovanni Schiaparelli found canals on the surface of Mars.
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Book about Mars written by Percival Lowell
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Attempted Mars flyby. Failure to launch.
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The discovery of Valles marineris canyon. Its distance was found to be about 6x greater than the Grand Canyon.
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Mars 2 was launched but failed to return any usable data.
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Viking 1 landed on Mars and brought back tons of photos.
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Asaph Hall discvored Mars has two moons later named Deimos and Phobos.
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Mars was the closest to Earth then it ever was before.
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Mars Rover successfully landed on Mars.
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Mars 1: An attempt to send people to live on Mars will begin.