Colorado Parks and Wildlife re-released a wolf into Grand County this week after it had traveled into New Mexico, according to a news release.

Just 20 days earlier, the Deepwater Horizon oil rig had exploded, killing 11 people and igniting one of the worst environmental disasters in modern history. A pelican and a Northern gannet were the fi

SpaceX has authorized an insider share sale that values Elon Musk's rocket and satellite maker at about $800 billion, according to a company message seen by Bloomberg on Dec. 12.

Between 128,000 and 186,000 years ago, when ice covered the Sierra Nevada, a lake 100 miles long and 600 feet deep sat in eastern California in what is now the Mojave Desert.

Almost a half-mile below the surface of Monterey Bay, California, scientists have recorded rare footage of a seven-arm octopus— only the fourth time the same research team has spotted the species in a

A highly pathogenic avian influenza was found in a herd of dairy cattle in Wisconsin, the latest in an ongoing outbreak of the disease, the U.S. Department of Agriculture said.