In 1917, a civil engineer pioneered the first deep-sea vehicle to attempt filming underwater. A century later, we have James ...

. But did you know that the number of viruses in the ocean outnumbers the amount of stars in the Milky Way ? Or how about the ...

Challenger Deep, in the Mariana Trench, is the deepest point in the ocean known so far, at approximately 11 kilometres - deeper than Mount Everest is tall. The Mariana Trench is 2,500 kilometres long, ...