Just as Earth’s land surface has enormous peaks and valleys, the oceanic world has similarly varied topography. Perhaps the most intriguing of these features is the Mariana Trench — a chasm in the ...

Submarines have been diving deeper and deeper into the ocean's depths, with undersea explorers looking to dive deeper than ...

Kathy Sullivan, an American geologist, has made history again. This past week, she became the first woman to reach Challenger Deep - that's the deepest point on the surface of the Earth. It's in the ...

Eleven years ago, Academy Award-winning filmmaker James Cameron surprised the world by taking a submersible he had secretly built, Deepsea Challenger, 35,787 feet down to Challenger Deep, the lowest ...