Countries have debated for decades whether to allow mining on the ocean floor, a potential trove of critical minerals. Now, a ...

Solomon Kahoʻohalahala steadied himself on the double-hulled voyaging canoe called Hōkūleʻa as a 15-foot swell rose and the ...

One startup, Impossible Metals, is developing a fleet of underwater robots that would hover above the seabed, instead of crawling along it. The robots would use mechanical arms to pluck nodules ...