Geography

The methane gas floats on the water's surface as many tiny bubbles. The density of the resulting gas-water mixture is much less than that of seawater. If a ship finds itself in such an area, due to the lower density, it quickly sinks below the actual sea surface, and the crew is unable even to make an emergency call. The ship sinks.

According to locals, the Cotopaxi crater looks like a crescent moon.

The course of the river was quite different before and during the period of the last glaciation.

The source of the Nile, sought after for thousands of years, turned out to be the Kagera River.

The Three Gorges Dam–the largest hydropower station in the world–is located on the Yangtze.

In the early 18th century, Colorado was recognized by the Spanish as part of their province of New Mexico.

In the 4th century A.D., small religious communities of anachorites began to form in Cappadocia.

Hawaii is an archipelago of volcanic islands located approximately 3200 km west of the United States.

There are mountains under the ocean's surface as well.

At one time, a tropical forest grew on Easter Island.