A new hiking trail will soon allow travellers to walk around England's entire coast – but a strange paradox means no one knows exactly how long it is.
From Fiji's kaleidoscopic reefs to shark-packed passes in French Polynesia, these six destinations offer some of the world's most exhilarating underwater experiences.
From bone-eating snot-flowers to snowboarding scale worms, when a whale dies it becomes a colossal island of nutrients – attracting weird and wonderful creatures to feast.
From fantasy photoshoots in the Maldives, to kelp forest "strolls" along California's Catalina Island and Taiwan's luxe hotel swims, swimming in a tail is different wherever you do it.
A photographer captured this extraordinary site where whales' bodies lie in the shallows, with troubling repercussions for the deep oceans.
From The Gambia to the US, sea salt is increasingly seeping into the freshwaters people need for drinking and producing food.
Beaked whales are rarely spotted. Now scientists are using underwater sounds to help identify these elusive creatures.
During the lockdowns of 2020, global shipping was severely restricted and ocean noise pollution all but ceased. Instead the songs of fish filled the sea.
Under the surface of the ocean, "constellations" of towering subsea mountains dot the Earth – and they are teeming with sharks.
