Geography

They extend latitudinally over nearly the entire surface of the globe.

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.

On 4th September 1609, the English sailor Henry Hudson, employed by the Dutch East India Company, reached the shores of Manhattan.

Over the years the water level in the lake has changed many times.

It covers almost 60 percent of Israel, covering an area of approximately 13.000 square kilometers.

A number of villages lie directly at the foot of the volcano.

The cascade on the Canadian side is called Horseshoe Falls and is 53 meters high.

It is home to many endemic fish species. At least 700 species of cichlids live in the waters of Lake Malawi.

Both names–Uluru and Ayers Rock–are officially in use since 1993.

Some of the tribes living in the tropical rainforests have no contact with outsiders.