Mars Kept a Secret for 3.5 Billion Years – NASA’s Curiosity Rover Finally Dug It Up

Scientists using NASA’s Curiosity rover have discovered siderite—an iron carbonate—in the sulfate-rich rocks of Gale Crater, solving a long-standing mystery about Mars’ missing carbonates.

This find provides powerful new clues about the planet’s ancient atmosphere and supports theories that it once harbored conditions suitable for liquid water. The discovery challenges previous satellite data and suggests that more carbon may be hidden below the Martian surface or lost to space.

Rethinking Mars’ Ancient Atmosphere
Scientists have long believed that Mars once had a thick, carbon dioxide-rich atmosphere and flowing liquid water on its surface. According to that theory, the CO2 and water should have reacted with the planet’s rocks to form carbonate minerals. But until recently, surface analyses by rovers and orbital instruments using near-infrared spectroscopy hadn’t detected the expected levels of carbonate.

Now, new findings reported in Science reveal otherwise. Data from three drill sites examined by NASA’s Curiosity rover show the presence of siderite—an iron-based carbonate mineral—within sulfate-rich rock layers on Mount Sharp, located in Gale Crater.

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Curiosity rover cracked open a rock and may have settled the 'life on Mars' debate

Imagine taking a leisurely Sunday drive, and you accidentally smash something on the road that turns out to be an unprecedented scientific revelation. Well, that’s exactly what happened to NASA’s Curiosity Mars rover when it struck yellow sulfur on the Red Planet.


While working its usual Martian shift, the rover stumbled upon, rather drove over, a rock and cracked it wide open, revealing a sight never before seen on Mars – a dazzling display of yellow sulfur crystals.

This unexpected discovery was relayed to a team of astounded scientists, including Ashwin Vasavada, the Curiosity’s project scientist from NASA’s Jet Propulsion Laboratory in Southern California.

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Life on Mars Likely

The mystery of life’s origins on Earth has long puzzled scientists, but a recent discovery on Mars might be shedding new light on this profound question, while also inching closer to finding life on Mars.

NASA’s Curiosity Mars rover has uncovered a patchwork of well-preserved ancient mud cracks, forming a distinctive hexagonal pattern, signaling the presence of wet-dry cycles on early Mars. These cycles could be key to the assembly of complex chemical building blocks necessary for microbial life.

A study published in Nature elaborates on the importance of this discovery. The lead author, William Rapin of France’s Institut de Recherche en Astrophysique et Planétologie, expressed his excitement, stating, “These particular mud cracks form when wet-dry conditions occur repeatedly – perhaps seasonally.”

Mud cracks named “Pontours”
Curiosity’s ongoing exploration of Mount Sharp, which stands 5 kilometers high in Gale Crater, has brought about this groundbreaking revelation. 

In 2021, after drilling a sample from a rock target nicknamed “Pontours,” located in a transitional zone between a clay-rich layer and a layer enriched with salty minerals called sulfates, the rover spotted these telling mud cracks.  READ MORE...

Alien Doorway on Mars

One of the most recent snaps beamed back from the Curiosity rover on Mars has revealed a rather interesting feature in the rocks: what looks to be a perfectly carved out doorway nestling in the Martian landscape.

The doorway doppelgänger is so eerily convincing we're almost tempted to start believing that it leads to a little hideaway for Martians, or perhaps a portal to another Universe entirely. We're also getting 'tunnel to the center of the planet' vibes from this.

However, the far more sensible people of Reddit have pointed to this likely being a shear fracture: the result of some kind of strain on the rock breaking part of it off, perhaps given a helping hand by a marsquake or two.

In fact, the largest temblor recorded on the red planet so far happened on May 4 of this year, and scientists are still working to pinpoint where exactly it happened and what caused it.

What's more, while the the door-like rock formation may appear to be full-sized in our imaginations, it's possible the cavity seen is only a few centimeters or inches tall in real life, though it's difficult to be certain from the picture.

At the very least, the picture and the geological feature it's captured would seem to be enough to inspire a science-fiction movie or two.  READ MORE...