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NASA's Mars Reconnaissance Orbiter shortly before swinging into orbit around Mars ten years ago.(NASA/JPL-Caltech)

HiRISE: 45,000 Mars Orbits and Counting

Mars as it may have looked like billions of years ago: Vast plumes of ash and water vapor billow into the atmosphere from the Tharsis region , a massive bulge of volcanic activity that created the tallest mountains in the solar system. Meanwhile, an icy ring of precipitation carves out valleys and canyons around a ring just south of the Martian equator.

The Reason for Mars’ Tumultuous Past

Girl with Piggy bank

How Parents, Romantic Partners Influence Student Spending

Gene Giacomelli harvests food fit for Mars at the UA's Controlled Environment Agriculture Center.(Photo: Norma Jean Gargasz/UANews)

'The Martian' Food-Growing System: It's Here

A digital terrain model of the crater that the UA's Ali Bramson investigated.(Image: American Geophysical Union)

Terraced Craters: Windows Into Mars' Icy Past

PolyCam, a telescope that doubles as a microscope, will spot the asteroid Bennu from a million miles away and then help identify dangerous areas on its surface.(Photo: Symeon Platts/UA)

The All-Seeing Eyes of OSIRIS-REx

A round structure uncovered at Ceibal, from about 500 B.C.(Photo: Takeshi Inomata)

Archaeologists Discover Maya 'Melting Pot'

An overview of the Acidalia Planitia region taken by the European Space Agency's Mars Express orbiter. The transition between Acidalia Planitia and Tempe Terra is shown here in a computer-generated perspective view.(Image: ESA/DLR/FU Berlin (G. Neukum)

UA Mars Scientists Capture Image of Sci-Fi Landing Site

The Great Fire of 1872 left large parts of Boston in ruins. Because many horses were sick with an outbreak of the flu, equipment had to be pulled by men, slowing firefighting efforts.

UA Study on Flu Evolution May Change Textbooks, History Books

This image includes an especially long example of a type of dark marking that advances down some Martian slopes in warmer months and fades away in cooler months.(Image: NASA/JPL-Caltech/UA)

UA HiRISE Mars Camera Reveals a More Dynamic Red Planet

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