A Strange Martian Rock Reveals a Mineral Scientists Never Expected

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A rare mineral fragment may reveal Mars’s hidden geological history

The Discovery Came From a Martian Meteorite

Scientists Found Garnet for the First Time

It Was Not Discovered by a Mars Rover

The Mineral Was Initially Mistaken for Pyroxene

This Garnet May Not Be Deep Red

The Fragment Contains Two Distinct Regions

Garnet Could Point to Martian Metamorphism

An Ancient Impact May Have Supplied the Heat

The Rock May Not Have Formed on Mars

The Decisive Test Could Damage the Sample

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A tiny fragment inside a meteorite has exposed a type of rock scientists had never previously recognised from Mars. Its chemistry appeared unusual during an examination at the Royal Ontario Museum, prompting researchers to look beyond their original explanation.

The result could expand what is known about the heat, pressure and fluid activity that shaped the Martian crust. However, one crucial uncertainty remains: the mysterious fragment may have formed on Mars—or arrived there from somewhere else in the Solar System.

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