Circumzenithal arcs have been described as upside-down rainbows or "a grin in the sky." They're wonderful! See photos here.

Were dinosaurs warm-blooded or cold-blooded? According to a new study that analyzed the chemistry of dinosaur eggshells, the answer is "warm."

An intense storm and lake-effect snow walloped upstate New York - especially rural areas in western New York - in late February 2020. On the shores of Lake Erie, the storm created a dramatic display of thick, windblown ice on homes and buildings.

On February 6, weather stations recorded the hottest temperature on record for Antarctica, 64.9°F (18.3°C). The warm spell caused widespread melting on nearby glaciers

Bird-banding data in North America shows a spring migration pattern that's become progressively earlier with each of the last 5 decades, and a fall migration that's lasting longer than 50 years ago.

These hot, dust-laden winds are known as “la calima” and happen most often in winter. They can blow at up to 75 mph (120 kph). The dust kicked up last weekend in Africa drifted over the Canary Islands, shutting down airports and stranding travelers.

A major ocean current in the Arctic is faster and more turbulent as a result of rapid sea ice melt, according to a new study.

One hundred million years ago, a bee got trapped in tree resin. Over time, geological forces converted the resin to amber. Now a scientist arrives on the scene, to tell us this bee’s story.

Recently-discovered fossils shed new light on an enormous horned turtle that roamed South America 5 to 10 million years ago.

A new tyrannosaur species named Thanatotheristes, which means “reaper of death,” was the apex predator of its time, 79 million years ago in present day Alberta, Canada.