Well, not exactly.
Giovanni Schiaparelli, an Italian Astronomer, was the first to describe canals on Mars in 1877 and they soon fired the popular imagination. Could they be a sign of life on Mars? Now there were a lot of scientists who thought this was a load of hooey. In the first place not all observers saw canals and in the second place no independent observer came up with exactly the same map of canals (at the time photography was not yet very advanced and Astronomers relied on hand drawn sketches).
Perhaps then the canals were seasonal, or indicated remaining damp sports where vegetation of some sort grew.
They saw some lighter or darker albedo features (for instance Syrtis Major) and believed that they were seeing oceans and continents. They also believed that Mars had a relatively substantial atmosphere. They knew that the rotation period of Mars (the length of its day) was almost the same as Earth’s, and they knew that Mars’ axial tilt was also almost the same as Earth’s, which meant it had seasons in the astronomical and meteorological sense. They could also see Mars’ polar ice caps shrinking and growing with these changing seasons. It was only when they interpreted changes in surface features as being due to the seasonal growth of plants that life was hypothesized by them.
Now one of the great proponents of the concept of Martian canals was Percival Lowell who, while a great designer and builder of observatories, was also a certifiable crackpot. He wrote 3 books on Mars, Mars, Mars and Its Canals, and Mars As the Abode of Life, that last of which in particular posited that the vast network of canals were created and maintained by intelligent life forms.
Then again he also saw a great mountain on Venus which we now suspect was due to the optical limitations of his telescope and the near horizon position in which he made his observations.
About the only prediction he made that did pan out was his inference of Pluto from the orbits of Neptune and Uranus and while the observatory named after him was able to confirm the existence of an object in about the position he thought it was, modern scientists doubt that it has enough mass to have the effects he described and have observed several similar objects in the outer Solar System and so have demoted it to a mere dwarf planet.
The Martian canal theory was pretty thoroughly debunked by the early 1900s. Experiments with amateur observers had shown the tendency to collect a series of point features into a line and as larger telescopes with better optics starting observing these features distinctly and recording them in photographs with long exposures and high quality it fell more out of favor among serious Astronomers. An important nail in the coffin was the development of spectography which Alfred Russel Wallace used to prove that the surface of Mars was too cold for liquid water and there was no evidence of water vapor in its atmosphere.
Still, the notion of water on Mars had by that time a firm hold on the public through authors like H.G. Wells and Edgar Rice Burroughs. Indeed it was used as a plot element as late as 1950 in the work of C.S. Lewis, Robert Heinlein, and Ray Bradbury, all of whom should have really known better.
So, does the discovery of the fact that Mount Sharp is composed of distinct layers of sediment which could only have been laid down by a large body of water prove Schiaparelli was right?
Alas the last vestige of liquid water vanished from the surface of Mars before the genus homo was even sapiens and while the diversity of life on this planet does present several organisms that could survive Mars’ harsh climate they are mostly microbial.
NASA’s Curiosity rover finds evidence of 3.5B year old Water Lake in Gale Crater
By Alexander, Inferverse
On December 9, 2014
Mars may have once had a massive lake, according to recent data revealed by the Curiosity Mars rover. It has led scientists to believe that at one time Mars was much wetter than originally thought. Gale Crater is the location at which scientists believe a 96-mile-wide crater existed.
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Dr. Michael Meyer, of NASA noted that “The size of the lake in Gale Crater and the length of time and series that water was showing up implies that there may have been sufficient time for life to get going and thrive.” The scientists noted sandstone deposits were pointed in the direction of Mount Sharp, which would indicate that at one time water flowed toward the center of the crater.
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The deposits are the first solid sign that scientists have had in some time that Mars very likely could have had a large body of water. This will give scientists new evidence and new leads to look at moving forward beyond this mission.
Nasa’s Mars Curiosity rover finds that 96-mile-wide crater once held lake
Reuters
Monday 8 December 2014 15.22 EST
Billions of years ago, a lake once filled the 96-mile-wide crater being explored by Nasa’s Mars rover Curiosity, bolstering evidence that the planet most like Earth in the solar system was once suitable for microbial life, scientists said on Monday.
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Scientists discovered stacks of rocks containing water-deposited sediments inclined toward the crater’s centre, which now sports a three-mile (5km) mound called Mount Sharp. That would mean that Mount Sharp did not exist during a period of time roughly 3.5 billion years ago when the crater was filled with water, Curiosity researchers told reporters during a conference call.“Finding the inclined strata was … a complete surprise,” said lead scientist John Grotzinger, with the California Institute of Technology in Pasadena.
“Sedimentary geology … is the cutting edge for trying to understand the Earth. When oil companies collect seismic surveys across places, they are looking for inclined strata because then you get geometry that tells you where the rocks are that you’re looking for,” he added.
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The new studies, which have not yet been published, point to a series of wet and dry times at Gale Crater, challenging a previously held notion that Mars’s period of warm climate was early and relatively short-lived, scientists said.“All that driving we did … just didn’t get us to Mount Sharp. It gave us the context to appreciate Mount Sharp,” Grotzinger said of the rover, which has travelled about five miles (8km) since landing on Mars in 2012.
The law that entropy always increases holds, I think, the supreme position among the laws of Nature. If someone points out to you that your pet theory of the universe is in disagreement with Maxwell’s equations – then so much the worse for Maxwell’s equations. If it is found to be contradicted by observation – well, these experimentalists do bungle things sometimes. But if your theory is found to be against the second law of thermodynamics I can give you no hope; there is nothing for it but to collapse in deepest humiliation.
–Sir Arthur Stanley Eddington, The Nature of the Physical World (1927)
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