NASA-backed scientists have examined a Martian meteorite estimated to be more than 4.1bn years old, finding traces of water activity that could help explain the planet’s earliest geological history.
Known as Teghaza 001, the pinkish rock was recovered from the Sahara Desert in Mali in 2022. It weighs roughly 800 grams and initially appeared unremarkable. However, detailed laboratory analysis revealed that it was exceptionally old and contained minerals altered by water billions of years ago.
The research, published in Science on 29 October, indicates that water circulated through rocks beneath Mars’ surface during the planet’s early...