This striking satellite photo shows the unusual shape of Spirit Lake, which was transformed into a giant anatomically inaccurate heart by the explosive eruption of Mount St. Helens in 1980.

This winter, with record snow in New Orleans and drought and destructive wildfires in Southern California, has not been normal.

The deep freeze at home didn't stop Earth from hitting another warming ... by curating what you need to know to keep the people and places you care about safe. We are dedicated to providing ...

That's why the ABC News Climate and Weather Unit is cutting through the noise by curating what you need to know to keep the people and places you care about safe ... Now we know that it was, in fact, ...

The coldest recorded days in history have occurred ... and sent the records to the Weather Bureau's Instrument Division in Washington DC, according to the University of Montana.

Some phenomena on Earth are so baffling that even scientists struggle to explain them. In 2000, two miners unexpectedly discovered the Cave of Crystals. What remains a mystery is the extraordinary ...

The coldest nights of the winter to date are forecast for this week in the Tri-Cities by the National Weather Service. Arctic air moving into Eastern Washington will drop the low to 11 degrees Tuesday ...

The search for the best observatory site in the world has led to the discovery of what is thought to be the coldest, driest, calmest place on Earth, a place where no human is thought to have ever ...

This surely is the most alien-looking place on Earth". Another person added: "Difficult to find the words to describe it." The place in question is Socotra, a small island that belongs to Yemen ...

Rising temperatures are fueled, in part, by declining cloud cover — which could be a potential climate feedback loop.