Ancient Martian Rock Found in Sahara Offers Clues to Early Red Planet

Researchers presented their findings in the journal Science, noting that the rock is among the three oldest Martian meteorites ever discovered on Earth. While similar to the famed ALH84001, Teghaza 001 features a distinct mixture of volcanic minerals that scientists believe mirrors the composition of Mars' cratered southern highlands. Yang Liu, lead author and scientist at NASA’s Jet Propulsion Laboratory, described the find as a potential Rosetta Stone for deciphering the planet's geological evolution.

The research team, utilizing a high-precision dating method developed at Caltech, analyzed zircon crystals within the rock to pinpoint its age. Unlike traditional destructive testing, this technique allowed the team to extract data from individual mineral grains while keeping the bulk of the rare sample intact. The results indicate that water significantly altered the rock’s structure over four billion years ago, suggesting that early Mars hosted a far more dynamic hydrological cycle than previously assumed. By mapping the meteorite's chemical fingerprint against orbital data from the Mars Reconnaissance Orbiter, scientists are now narrowing down the specific regions of the Martian crust that may have birthed this ancient traveler.