From Europe to North America, an energy revolution is breathing new life into empty, long-forgotten coal mine shafts—by repurposing them into places to store renewable energy. Using "gravity ...

Reasons to be Cheerful explains how "gravity batteries" are giving former mines a second life—while offering an economic and environmental boost to communities once reliant on coal. From Europe ...

2-Year U.S. Treasury Note Continuous Contract $104.086 0.137 0.13% 5-Year U.S. Treasury Note Continuous Contract $109.414 0.289 0.26% 10-Year U.S. Treasury Note Continuous Contract $113.063 0.422 ...

YouTube videos and Facebook pages are devoted to rappelling in and exploring their shafts. Website authors wax nostalgic about the hunt for gold and silver deposits in the 1800s. But these same ...

President Donald Trump on Tuesday signed several executive orders that aim to boost domestic coal production, citing the need to meet rising electricity demand from artificial intelligence.

The Wavegarden surf park at Koa Bay in Fort Pierce doesn’t have an opening date yet. Its surf packages cost $1,080-$5,625 — but its hourly sessions typically are much more affordable.