Scientists Find Rare Meteorite From Mars With Signs of Ancient Water

Scientists have discovered an extraordinary meteorite originating from Mars, holding promising evidence of ancient water on the red planet. A geologist at the Lunar and Planetary Institute in Texas expressed astonishment, stating that it appears to be of the oldest Mars meteorites ever found. The meteorite, technically a collection of eight fragments with the largest measuring approximately the size of a fist, was unearthed in the Sahara desert in Mali back in 2022. Currently, most of the meteorite is housed in a museum in Maine.

Upon initial assessment, the meteorite was identified as originating from Mars. Further research has yielded remarkable findings, with scientists now delving deeper into its composition. Lee Saper, co-author of a recent paper published in Science, revealed the meteorite's uniqueness, emphasizing how it provides records of water-rock interactions and potentially even an imprint of the Martian atmosphere as it lost water.

The significance of this meteorite was underscored by Yang Liu of NASA's Jet Propulsion Laboratory, who called it a Rosetta Stone for Mars. The meteorite's mineral composition narrates the story of how Mars' crust formed from cooling magma before being altered by subsurface water. The story begins 4.1 billion years ago, with zircon crystals solidifying from molten magma on Mars. This date places the Teghaza meteorite alongside only two other Martian rocks known to have formed by 4 billion years ago.

Perhaps the most intriguing aspect is the meteorite's indication of having been exposed to water during its evolution, as detailed in a subsequent study published in Science Advances. This discovery opens up new avenues for understanding the history of water on Mars.