A new study finds that installing solar panels on snow-covered mountains could help close the gap between demand and production during the winter months.
Arbaz, Switzerland: A controlled avalanche, started with dynamite, slides down a mountain in the Swiss canton of Valais.
Lightning illuminates the night sky over the village of Cully surrounded by the vineyard terraces of Lavaux on the bank of Leman Lake from Chexbres on late July 30th, 2017.