This rectangular version of a self-portrait of NASA's Mars rover Curiosity combines dozens of exposures taken by the rover's Mars Hand Lens Imager (MAHLI) during the 177th Martian day, or sol, of Curiosity's work on Mars (Feb. 3, 2013). The rover is positioned at a patch of flat outcrop called "John Klein," which was selected as the site for the first rock-drilling activities by Curiosity. The self-portrait was acquired to document the drilling site. The rover's robotic arm is not visible in the mosaic. MAHLI, which took the component images for this mosaic, is mounted on a turret at the end of the arm. Wrist motions and turret rotations on the arm allowed MAHLI to acquire the mosaic's component images. The arm was positioned out of the shot in the images or portions of images used in the mosaic. Image credit: NASA/JPL-Caltech/MSSS

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NASA’s Mars Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) mission is the first interplanetary launch from the West Coast of the U.S. After its six-month journey, InSight will descend to Mars to study the heart of the Red Planet. Credits: NASA

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Long’s Peak framed by rock outcrop, Rocky Mountain National Park, Colorado. Roy Luck, CC BY

Nitrogen from rock could fuel more plant growth around the world – but not enough to prevent climate change

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MESSENGER enhanced colour image showing the southern half of Mercury’s Caloris basin, hosting several red spots. NASA/JHUAPL/CIW, Author provided

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Artist’s rendition showing the inner structure of Mars. The topmost layer is known as the crust, underneath it is the mantle, which rests on an inner core. Credits: NASA/JPL-Caltech

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This mosaic taken by NASA's Mars Curiosity rover looks uphill at Mount Sharp, which Curiosity has been climbing since 2014. Highlighted in white is an area with clay-bearing rocks that scientists are eager to explore; it could shed additional light on the role of water in creating Mount Sharp. The mosaic was assembled from dozens of images taken by Curiosity's Mast Camera (Mastcam). It was taken on Sol 1931 back in January. Credits: NASA/JPL-Caltech/MSSS

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An artist’s rendition of the InSight lander - which will collect data on what’s inside the planet Mars. NASA

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Rohit Bhartia of NASA's Mars 2020 mission holds a slice of a meteorite scientists have determined came from Mars. One of two slices will be used for testing a laser instrument for NASA's Mars 2020 rover while it's still on Earth; the other slice will go to Mars onboard the rover. Credits: NASA/JPL-Caltech

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This exposure of finely laminated bedrock on Mars includes tiny crystal-shaped bumps, plus mineral veins with both bright and dark material. This rock target, called "Jura," was imaged by the MAHLI camera on NASA's Curiosity Mars rover on Jan. 4, 2018, during Sol 1925 of the mission. Credits: NASA/JPL-Caltech/MSSS

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Seismic shockwaves after a meteorite’s collision could affect systems all over the planet. solarseven/Shutterstock.com

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The extinction of dinosaurs is one of the many periods of mass extinctions on earth. www.shutterstrock.com/Jaroslav Moravcik

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This view of a portion of the Eridania region of Mars shows blocks of deep-basin deposits that have been surrounded and partially buried by younger volcanic deposits. The image was taken by the Context Camera on NASA's Mars Reconnaissance Orbiter and covers an area about 12 miles wide. Credits: NASA/JPL-Caltech/MSSS

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Olympus Mons, biggest volcano in the Solar System. Justin Cowart, CC BY-SA

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