A dirty secret deep down

When Filipino oceanographer Deo Florence Onda and American explorer Victor Vescovo descended into the Emden Deep in the Philippine Trench, the third deepest point in the world, they were met with almost complete stillness.

At a depth of 10,045m, they peered through the small windows of the deep-sea submersible DSV Limiting Factor and watched their surroundings move as if in slow motion.