On Thursday, 9-year-old Case Wallace and his class were participating in the Arizona Gold Mining Experience at the Cave Creek Museum when he found real gold at the stamp mill and gold panning station.

Naturally occurring "white hydrogen" lies in vast reservoirs beneath our feet – now the gold rush of the clean energy era is ...

For a leisurely spelunking experience, climb aboard a tram to experience America's only ride-thru cave, with epic geologic ...

For centuries, humans have lived underground. Today, that ancient practice is under dire threat—even as cave life makes more ...