Videos from Yosemite National Park show the iconic "Firefall" phenomenon glowing at Horsetail Fall inside California's crown jewel.

This lava-like visual is only seen when the conditions are perfect, and the sunset aligns with the waterfall just right.

But if daytime skies were darkened during the total solar eclipse, does that mean the night will grow darker during a total ...

Arctic daily sea ice extent continued to hover near record daily lows in January, with the ice edge well northward of its long-term average position in most areas. In contrast to the cold conditions ...