Mouse found near 7,000 meters may rewrite limits of mammal survival‎

A tiny mouse living nearly 7,000 meters (23,000 feet) above sea level in the Andes is helping scientists rethink the limits of life on Earth. The animal, a leaf-eared mouse, is the focus of a new international study co-authored by McMaster University researchers, revealing how mammals can survive in conditions once thought uninhabitable.