Expeditions to the depths of the oceans have revealed strange dark worlds bristling with species new to science – now the race is on to discover them.
If the Earth's oceans were the size of the island of Manhattan, then oceanographer and deep-sea explorer Edith Widder estimates that we've explored the equivalent of perhaps one block – but only at first-floor level.
Oceans make up roughly 99.5% of the planet's habitats by volume, and within those largely unexplored depths there are thought to be scores of large marine animals unknown to science. When you consider smaller animals too, the number of unknown species rises to the millions. เเทงบอลออนไลน์