Lake Baikal, the world's deepest, offers astounding views along its shoreline - and winter tours of its frozen expanse have become increasingly popular. With some trepidation, Oleg Boldyrev walked ...

The earth’s lakes supply vital water resources ... Have you ever wondered which lakes are the deepest? Watch this video to discover the 15 deepest U.S. lakes and other fascinating facts about ...

Geologists think it could extend more than half a mile (1 kilometer) below Earth's surface, which is more than twice as deep ...