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Life may have existed on warm, rainy, ancient Mars before winter came



A recent photo taken of a Curiosity rover shows her current location known as Til Ridge.

The cooled lava helped to preserve the footprint of where the dunes once moved in the southeastern region of Mars. But it also looks like the Star Trek symbol.

The NASA InSight lander uses a camera of its robotic arm to capture this sunset on Mars on April 25.

An InSight seismometer first recorded an earthquake on April 6, 201

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A photograph of a preserved Mars river channel made by an orbiting satellite with a colored coating showing different elevations. Blue is low and yellow is high.

NASA has been exploring Mars since 1965. Here are some of the best moments captured by Mars missions over the years.
The European Space Agency's Mars Express Mission captured this image of the Korolev Crater, more than 50 miles across, and filled with water ice near the North Pole.

This is the first NASA InSight selfie on Mars. Displays solar panels and the landing deck. At the top of the deck are his scientific instruments, weather sensor booms and a UHF antenna.

This perspective of the Mars & # 39; Valles Marineris hemisphere from July 9, 2013 is actually a mosaic comprising 102 images of a Viking orbiter. In the center is the canyon system Valles Marineris, which is over 2000 km long and up to 8 km deep.

Rovers can also take selfies. This self portrait of the Curiosity Mars Rover shows the vehicle at the Quela drill site in the Murray Buttes area on the lower Sharp Peak.

Mars is far from a flat, barren landscape. Nili Patera is a region of Mars in which dunes and ripples move fast. HiRISE, aboard the Marine Intelligence Orbit, continues to monitor this area every few months to see changes in seasonal and annual scales.

What Do Mars Blueberries Do? These small, mineral-rich hematites are near the Fram Crater, visited by NASA's Opportunity Rover in April 2004. The area shown is 1.2 inches wide. The view comes from the microscopic image of the robotic arm of Opportunity with colorful information added from the panoramic camera of the rover. These minerals suggest that Mars had a watery past.

Mars is known to have dust storms surrounding planets. These 2001 photos from the orbit of the NASA Mars Global Surveyor show a dramatic change in the appearance of the planet as the fog lifted by the dust storm southwards spreads worldwide.

Curiosity took photos on September 9, 2015 at Sharpe Mountain, Hematite, an enriched ridge, plain, filled with clay minerals to create composite and rounded boutiques high in sulfate minerals. The changing mineralogy in these layers of Mount Sharp suggests a changing environment in early Mars, though they all involve exposure to water billions of years ago.

HiRISE captures layered deposits and a bright ice cap at the north pole of Martian.

This image, which combines data from two instruments aboard the NASA Mars Global Surveyor, depicts an orbital view of the northern polar region of Mars. The ice-rich polar hat is 621 miles long and the dark stripes are deep. To the right of the center, a large canyon of Chasma Boreale almost breaks the ice cap. Chasma Boreale is the length of the famous United States Grand Canyon and is up to 1.2 miles deep.

Although Mars is not as geologically active as Earth, surface characteristics are strongly shaped by wind. Wind-carved features like those called palaces are common on the Red Planet. On the sand the wind forms waves and small dunes. In the thin atmosphere of Mars, light does not scatter much, so that the shadows cast by the court tongues are sharp and dark.

Since landing high on the ridge, Opportunity has recorded this image of a Martian devil of dust twisting through the valley below. The view looks back to the tracks of the rover leading up to the northern slope of the Knudsen Range, which forms part of the southern edge of the Marathon Valley.

HiRISE made this image of a kilometer-wide crater in the southern hemisphere of Mars in June 2014. The crater shows frost on all its slopes facing south in late winter as Mars heads into spring.

The Mars Investigative Mars uses its HiRISE camera to get this view of an area of ​​unusual texture on the southern floor of Galle Crater.

A dramatic, fresh impact crater dominates this image taken by the HiRISE camera on November 19, 2013. The crater extends about 100 feet and is surrounded by a large, thin explosion zone. As the terrain on which the crater forms is dusty, the fresh crater looks blue in enhanced image color due to the removal of reddish dust in the area.

The opportunity uses its panoramic camera to capture this view of the eastward horizon on October 31, 2010. Part of the eastern edge of the Endeavor Crater, nearly 19 miles away, is visible above the Meridiani Planum.


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