Death Valley National Park has experienced so much record-breaking rainfall this season that an ancient lake has reappeared.
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.
As the climate warmed and the ice retreated, the lake dried up, leaving a w... [3672 chars]