Pearls are being rotated as they grow within the pouch that holds them inside the soft mantle tissue of molluscs.

The drawings below show various blue spheres representing relative amounts of Earth's water in comparison to the size of the Earth.

First study of its kind finds aquarium tropical fish imports to the U.S. often misreported

Vast majority allows fishing and other activities.

Many Pacific Island navigators have reported finding land by following mysterious streaks of light that extend between islands quite some distance away, and they report that it is not the ordinary kind of bioluminescence kicked up in the wakes of canoes.

In a research of unprecedented level, experts at the Woods Hold Oceanographic Institution (WHOI) managed to calculate the answer to two of the most basic questions about out planet – how deep the ocean is, and how much water it contains.

For millennia, mankind has been obtaining nourishment from the oceans, not only from fish and shellfish but also from the various types of plant life. The oceans are also home to some of the most pois

Video Description Engineers monitoring BP's damaged well detected seepage on the ocean floor that could mean problems with the cap that has stopped oil from gushing into the Gulf of Mexico. Reuters reports.

In The Know: Are Our Children Learning Enough About Whales?