NOAA reports that carbon dioxide in Earth’s atmosphere continued its rapid rise in 2019, reaching the highest recorded levels in 61 years of observation last month.

What is ball lightning? Scientists have been trying to figure that out for hundreds of years, and now it seems they may finally be close to solving one of Earth’s most intriguing natural mysteries.

It’s easy to confuse these 2 elusive, colorful, beautiful daytime sky phenomena. How can you tell the difference?

A new study reports that sponges, which can filter 10,000 liters of water daily, catch DNA in their tissues as they filter-feed.

A new analysis of 200,000 glaciers worldwide paints a picture of a future planet with a lot less ice and a lot more water.

Roughly the same size of Belgium, Canada’s Great Slave Lake runs nearly 2,000 feet (600 meters) deep. This article from NASA Earth Observatory describes the lake and conditions around it in 2019.

Super-sized beavers were as big as black bears. They suddenly became extinct 10,000 years ago, while small modern beavers survived. Now scientists know why.

Atlantic hurricane season begins June 1 and ends November 30. Here’s how forecasters make predictions, whether to stay or evacuate, what kinds of risks extend inland, and how your social networks can help or hurt you.

April 2019 was the 2nd-hottest April in the climate record, dating back to 1880, and the period from January-April was the 3rd-hottest year-to-date on record. In the Arctic, sea ice coverage shrunk to a record April low.

New analyses of satellite data show that the start of the spring growing season in northern Europe has advanced by 0.3 days per year from 2000 to 2016.