“Among the 19 cities that have hosted the winter Olympics — including Calgary, Chamonix, Nagano, and Oslo — the average February temperature is up to 46 degrees, up from 32 in the 1920s. These days, everyone is making snow. And among them, Heavenly’s system is known to be one of the most expensive and sophisticated. If they can’t save their season, no one can.” Conditions in Tahoe and other skiing regions are so bad that even the big money players are having trouble making enough snow and dough to stay open. Bloomberg takes you inside the high-tech fight to save California skiing.

+ Barren gravel doesn’t make for a very good Iditarod.

+ The mysterious (and cool) science of icicles.