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Arctic sea ice has likely reached its minimum extent for the year, at 3.74 million square kilometers (1.44 million square miles), according to scientists at the National Snow and Ice Data Center. This is the second lowest extent in the nearly 42-year satellite record.

Ever wonder why some fireflies flash in harmony? New research sheds light on this beautiful phenomenon and strives to understand how relatively simple insects manage to coordinate such feats of synchronization.

New CU Boulder-led research finds the traits that make vertebrates distinct from invertebrates were made possible by the emergence of a new set of genes 500 million years ago.

People are starting almost all the wildfires that threaten U.S. homes, according to an innovative new analysis combining housing and wildfire data.

Volcanic ash shuts down air traffic and can sicken people. But a new study suggests it may also be more important for Earth's climate than once thought.

Three CU Boulder faculty are principal investigators on a new five-year, $6.9 million National Science Foundation grant to study the 鈥渃ritical zone鈥濃�攆rom Earth鈥檚 bedrock to tree canopy top鈥攊n the American West.

A new study of 22 burn areas across 710 square miles found that forests are not recovering from fires as well as they used to, and many regions will be unsuitable for ponderosa pine and Douglas fir in the coming decades.

Viewers from Baltimore to Berlin can now step out onto an ice floe in the middle of the Arctic Ocean and watch and listen as scientists race the fading light to set up one of the most ambitious international climate collaborations ever, MOSAiC.

New research identifies fertilizer and pesticide applications to croplands as the largest source of sulfur in the environment鈥攗p to 10 times higher than the peak sulfur load seen in the second half of the 20th century, during the days of acid rain.

Attention to climate change has rapidly declined in recent months. That's concerning, say study authors who found that simply directing one's attention to an environmental risk鈥攅ven briefly and involuntarily鈥攎akes people more concerned and willing to take action.