Scientists once thought no mammals could survive at this altitude. But a tiny mouse living almost 22,000 feet up in the Andes is proving them wrong and offering clues about life in extreme conditions.
Copyright 2026 NPR
Scientists once thought no mammals could survive at this altitude. But a tiny mouse living almost 22,000 feet up in the Andes is proving them wrong and offering clues about life in extreme conditions.
Copyright 2026 NPR