New research published in Science finds evidence that Teghaza 001 interacted with water more than 4.1 billion years ago
A new study of Teghaza 001, a Martian meteorite in the Maine Mineral & Gem Museum’s collection is helping scientists piece together the story of Mars’ past.
Published October 29th, 2026 in the journal Science, the research identifies Teghaza 001 as an unusually ancient rock that formed at least 4.1 billion years ago. Researchers found evidence that the meteorite interacted with water on Mars before an impact sent it into space.
Martian meteorites offer scientists a way to study the planet’s geology here on Earth. But many of the Martian meteorites studied to date are relatively young compared with the ancient rocks that make up much of Mars’ surface. Teghaza 001 provides a rare opportunity to learn more about the planet’s early crust.
The researchers found that Teghaza 001 has a composition, mineralogy and texture distinct from other known Martian meteorites. Their analysis also points to a geochemically distinct source in Mars’ mantle and evidence of reactions with water-rich fluids before the rock was ejected from the planet.
The findings add to our understanding of Mars’ geological history and the conditions that existed billions of years ago.
Teghaza 001 is part of the Maine Mineral & Gem Museum’s collection in Bethel, Maine, where visitors can explore specimens that tell stories about the history of our planet and the wider solar system.
The study is available in Science: https://www.science.org/doi/10.1126/science.adz5646
About the Maine Mineral & Gem Museum
Nestled in the heart of Bethel, Maine, the Maine Mineral & Gem Museum is home to the most significant collection of Maine minerals and gemstones in the world. The museum also houses an internationally significant collection of meteorites, including rare specimens from the Moon and Mars that contribute to ongoing research into the history and evolution of the solar system. Through its collections, exhibits, education programs, and support for scientific research, MMGM invites visitors to explore the remarkable story of our planet and its place in the universe.
For admission information and upcoming events, visit www.mainemineralmuseum.org and follow MMGM on Facebook and Instagram @mainemineralmuseum.
For more information, contact MMGM media contact Aidan McCourt at amccourt@mainemineralmuseum.org.
