Park rangers are searching for two rowdy guests who were filmed toppling and destroying ancient rock formations at the U.S.

More human remains have been found in Lake Mead, just one week after the body ... adding they thought it was a large rock before finding bones. "At first I thought it was a bighorn sheep and ...

Lake Mead reached its highest point, with water levels measured at 1,225 feet, in July 1983. Levels have plunged since then.