Tiny mice found mummified at the summits of Andean volcanoes appear to be living in the harsh environment, which resembles Mars more than it does Earth
Tiny mice found mummified on the peaks of Andean volcanoes had made a home in the Mars-like environment, new evidence suggests—as impossible as the feat would seem.
That’s why he and one of his colleagues were shocked when, near the top of the Andean volcano Llullaillaco, they stumbled on a naturally mummified leaf-eared mouse . Archaeologists had reported similarly preserved mice from Incan sites on the peaks, but they had assumed the rodents were either hitchhikers or offerings brought by humans during excursions to these locations. Storz’s find wasn’t near any known Incan site, so he decided to look around the region more closely.
Then the scientists sequenced the genomes of the high-altitude mice and compared them to the genomes of leaf-eared mice found at lower elevations. That analysis suggested that these two groups of mice were closely related and still members of the same species. The researchers also determined that the summit mice were split evenly between males and females and that two pairs of mice found on one peak were either siblings or a parent and a pup.
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