Why is it so quiet outside on a snowy day? It's not just because people avoid venturing outside. It's also because of the properties of snow itself.
As winter begins and snow blankets the country, keep in mind that we all depend on snow.
Researchers have examined the activities of many different species during three consecutive winters in Svalbard, and have found that some are more active than expected.
It turns out that California hasn't been this dry in 500 years. Scientists have examined tree rings and found that the High Sierra's winter snowpack was the smallest it's been in centuries.
It turns out that some ancient snow patches which have existed for thousands of years are now melting at record speeds. Scientists have found that glaciers and permanent snow patches in Norway are now vanishing at an astonishing rate.