PARK CITY, United States---He is best known as hunky, sea-dwelling superhero "Aquaman," but actor Jason Momoa brought a stark and sober warning about the perils of deep-sea mining to the Sundance film festival on Friday, Jan. 20. The Hawaiian-born A-lister narrates "Deep Rising," a new documentary about the frenzied efforts by resource-hungry corporations to scrape valuable metals from vast swathes of the Pacific floor. Supporters of deep-sea mining claim that pellets of nickel and cobalt---used in electric car batteries---can be conveniently scooped off the seabed, helping reduce our fossil fuel reliance. But conservation groups and scientists fear this could devastate poor...Keep on reading: ‘Aquaman’ warns Sundance of deep-sea mining peril