Martian Meteorite Found in Sahara Is 4.1 Billion Years Old

A pink Martian meteorite discovered in the Sahara Desert in 2022 has been confirmed by NASA-funded researchers to be 4.1 billion years old, making it one of the most ancient rocks of its kind ever analyzed.

The 800-gram specimen, now named Teghaza 001 after the region in which it was found, is believed to have been ejected from the Martian surface following a significant impact event, most likely caused by an asteroid striking the planet.

Following this violent departure from Mars, the rock is thought to have drifted through space for an extended period before eventually falling to Earth, landing undetected in the remote desert terrain of the Sahara.

Scientists determined the meteorite's age using radiometric dating, a technique that measures the natural decay of certain elements within a rock's minerals to establish how long ago it formed.

The rock's extreme age places its formation within an early and poorly understood epoch of Martian history, a period that researchers say is crucial for reconstructing how the planet evolved over billions of years.

NASA has a long-standing interest in supporting research into Martian meteorites, as such specimens provide direct physical evidence from the planet without the expense of a dedicated sample-return mission.

Each confirmed Martian meteorite adds to a limited global collection, and researchers say analyzing these rare specimens helps refine scientific models of the Red Planet's early geology and environmental conditions.

Findings from the study of Teghaza 001 are expected to contribute to a broader understanding of how volcanic activity, impacts and other processes shaped the Martian surface billions of years ago.

While the full scope of the research remains limited by the details so far released, scientists have emphasized that confirming the rock's age and origin required careful, methodical analysis of its mineral composition.

The discovery is likely to draw continued scientific attention, as meteorites of this age are exceedingly rare and offer a valuable window into the distant past of a planet that remains a central focus of ongoing space exploration.