Environmental News Network: Pikas are small mammals closely related to rabbits and hares that are native to cold, alpine climates in North America, Asia and Eastern Europe. Pikas are very sensitive to heat, dying if they spend more than two hours above 78 degrees Fahrenheit, so cold climate is important to their survival. And sadly, as increasing temperatures continue to play a role in our changing climate, pikas have gone extinct in some mountain ranges and moved to higher peaks in others in the American West. However,...