A third set of human remains were found in Nevada's Lake Mead on July 25 as water levels have receded to historic lows during a drought fueled by climate change.

The remains were spotted by a witness at Swim Beach on Lake Mead during the afternoon of July 25, the National Park Service announced. Investigators retrieved the remains, the park service said. They are at the least the third set of remains found as the drought-stricken reservoir, which supplies water to 25 million people across the Southwest, has receded to unprecedented levels.

Over the past two decades, Lake Mead, the nation's largest reservoir, has dropped 180 feet and is now less than 30 percent full, according to the U.S. Bureau of Reclamation. The water levels have dropped so low, grim discoveries are being revealed, and some believe it's only the beginning.

Over the past two decades, Lake Mead, the nation's largest reservoir, has dropped 180 feet and is now less than 30 percent full, according to the U.S. Bureau of Reclamation. The water levels have dropped so low, grim discoveries are being revealed, and some believe it's only the beginning.

A severe drought brought on by climate change revealed an ancient Bronze Age city in Iraq, and gave archaeologists a chance to map it, researchers announced Monday.

A severe drought brought on by climate change revealed an ancient Bronze Age city in Iraq, and gave archaeologists a chance to map it, researchers announced Monday.

As climate change fuels grim discoveries across the West, Las Vegas is awash in bets on the identity of a suspected murder victim dumped in a barrel.

To many observers, the grim discovery inspired a callback to a darker Las Vegas past.