Dive into the deep! See 25 massive sea creatures caught on camera, from blue whales to colossal squid. Explore rare footage ...

Thousands of meters below the ocean's surface lurk some gigantic creatures, much larger than their shallow-water brethren. Scientists have a few hunches for why this happens, but the debate continues.

A millimeter-sized sea animal could hold clues to the evolution of the human nervous system. While placozoans are simple animals only as big as a grain of sand, the blobs have unique cells that could ...

Marine animals shrink more during periods of climate warming, according to a study spanning nearly 500 million years of Earth ...

In H. P. Lovecraft’s chilling science-fiction novella At the Mountains of Madness, a group of researchers uncovers the ruins of an ancient alien civilization while exploring beneath Antarctica. Now a ...