2023 has been...weird. Join Mashable as we look back at everything that's delighted, amazed, or just confused us in 2023. Below 1,000 meters, the ocean is eternally dark. Sunlight can't penetrate ...

An excellent diving site, this incredible duo of caves is a favorite of both tourists and locals alike. The two caves—known as Cenote Dos Ojos—were created by two 70-foot sinkholes connected by a ...

From a ballet of whitetip reef sharks to a male cardinal fish releasing freshly-hatched babies from its mouth, these winning underwater photos are a revelation of our oceans’ wonders. "Synchronicity," ...