This Mars rock has teeth

Part of the rock outcrop called Cooperstown. Interesting pointed protrusions can be seen. Credit: NASA / JPL-Caltech
Part of the rock outcrop called Cooperstown. Interesting pointed protrusions can be seen in this Mastcam image from sol 440. Click image for larger version. Credit: NASA / JPL-Caltech

As the Curiosity rover currently inspects a rock outcrop called Cooperstown, this rock seems to be baring its teeth. Some interesting pointed protrusions can be seen near the middle and lower right of the image. Below is a closeup of one of these teeth-like protrusions. Fossilized Martian shark teeth? No, probably not, but they are an intriguing feature for sure.

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The winds still blow in thin but active Martian atmosphere

Mars’ atmosphere is much thinner now than it once was, but it still has clouds, as seen in this NASA photo, as well as fog, wind, dust storms, and snow. Credit: NASA / JPL
Mars’ atmosphere is much thinner now than it once was, but it still has clouds, as seen in this NASA photo, as well as fog, wind, dust storms and snow. Credit: NASA / JPL

For any future astronauts who land on Mars, there is one piece of advice that shouldn’t even need to be said: keep your helmet on! Mars has an atmosphere, like Earth, but it is much thinner than ours (and mostly carbon dioxide), and so is unbreathable by humans. However, evidence has continued to grow that Mars’ atmosphere was once a lot thicker than it is now, early on in the planet’s history. Recent findings from the Curiosity rover have added to that evidence, as well as showing not only how Mars has lost most of the atmosphere that it once had, but also that the atmosphere which remains is still very active.

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Has Curiosity found Martian rock varnish?

Before and after image of a rock lasered by Curiosity. The surface of the rock has darkened around the spot hit by the laser. Credit: Los Alamos National Laboratory
Before and after image of a rock lasered by Curiosity. The surface of the rock has darkened around the spot hit by the laser. Credit: Los Alamos National Laboratory

Scientists studying data from the Curiosity rover have found another interesting puzzle, one which may easily have gone unnoticed were it not for one diligent researcher in particular, it was announced last week at the 44th Annual Lunar and Planetary Science Conference at The Woodlands, Texas.

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Curiosity finds odd ‘bubbles’

One of the larger and most prominent “bubbles.” Credit: NASA / JPL

Having just finished its sampling of the soil at Rocknest, Curiosity is now moving farther north-east into the Glenelg area, and has come across another interesting “curiosity” – small, usually roughly circular ring-like features on some of the surrounding bedrock slabs which look like shallow depressions with a raised rim, kind of like frothy “bubbles” which have popped.

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