NASA scientists have undertaken research in the Scottish Highlands to investigate rocks that may help answer questions about whether microbial life ever existed on Mars. The US space agency previously announced that its Perseverance rover had identified potential biosignatures—markings on Martian rocks that could have been created by ancient microbes.
During the summer, a research team collected samples from the Stoer Formation, a geological feature located near Clachtoll in Assynt in the north-west Highlands. NASA noted that the rocks in this Scottish region formed under conditions similar to those of ancient Martian lakes and rivers. The agency added that the area’s rocks may preserve evidence of microbial life dating back approximately 1.2 billion years. The research expedition was led by NASA’s Goddard Instrument Field Team, which focuses on studying Earth’s extreme environments, with participation from researchers at the universities of Glasgow and Cambridge.
According to NASA, both Mars and Earth share similar geological characteristics shaped by ancient water flow. The agency explained that both planets have layered deposits of mudstones and siltstones containing clay minerals. By examining how signatures of ancient life appear in Earth rocks such as those found in Scottish cliffs, scientists hope to develop better methods for identifying biosignatures on Mars and understanding whether conditions on the Red Planet could have supported life.
Scotland’s ancient geological formations have previously served as research sites for Mars-related investigations. Last year, a University of St Andrews team tested technology intended for detecting Martian life at Lower Diabaig in Torridon, where rocks billions of years old share similarities with Martian formations. NASA has named several Martian geological features after Scottish locations, including Torridon, Siccar Point, Muck, Wick, Sandwick, and Holyrood, recognizing the significance of these terrestrial sites for planetary science research.
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