The most recent Mars rover, called Curiosity, landed on Aug. 6, 2012, on the Aeolis Palus plain near the Gale Crater. Three previous rovers successfully landed on Mars, including the Sojourner on July 4, 1997; Spirit on ... More »

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Mars rovers have uncovered a variety of different things on the red planet, including geographical features such as dried up lake beds, patches of salt crystals believed to be former sites of salt water bodies and multip... More »

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Curiosity, a rover that's exploring Mars as of 2014, has a top ground speed of 1.5 inches per second, or about 0.1 mph. Curiosity landed on Mars on Aug. 5, 2012. More »

Curiosity, a rover that's exploring Mars as of 2014, has a top ground speed of 1.5 inches per second, or about 0.1 mph. Curiosity landed on Mars on Aug. 5, 2012. More »

Mars earned its famous moniker, "red planet," due to its red appearance that is highly visible from Earth. The distinct rusty-red color of Mars is attributed to the abundance of iron-rich soil that covers the planet's su... More »

Mars is the second smallest planet in the solar system, with a diameter of just over 4,212 miles and a circumference of 13,256 miles. Its diameter is about 53 percent that of the Earth. Among the major planets, only Merc... More »

Because Mars with its famous red coloration is readily visible from Earth, it is unknown who first discovered it; NASA lists the planet as "known by the ancients." There are records of its existence as far back as ancien... More »

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