Add Yahoo as a preferred source to see more of our stories on Google. Then suddenly, there’s a shrill, impossibly high-pitched “eeep!” to break through the hush. The sound of a pika alerting its ...

Getting your Trinity Audio player ready... Above 8,000 feet in Colorado, pikas — a tiny, furry animal with large mouse-like ears — can be seen and heard on hiking and rock-climbing trails. “When I’m ...

Hiking a 14er nearly always delivers a certain ecological transition. Though some have trailheads that start above treeline, most start lower, with a winding path through a forest. Then at a certain ...