The subnivium, a secret world beneath the snow, is at risk from global warming

FRISCO ? Beneath winter?s deep snows there is a secret world of frozen insects and amphibians in quasi-hibernation, where small mammals scoot about eating bugs and fungi. It?s an ecoogical world that?s mostly invisible but functions as a critical part of larger ecosystems. The subnivium, as scientists have dubbed it, is now at risk from global warming.