The world's largest lake is so vast that it's four times larger than its closest competitor and is often dubbed as a fully-fledged sea.

Environmental activists are alarmed over the rapidly declining water levels of the Caspian Sea, highlighting the urgent need for action. The falling water levels pose significant threats to the ...

However, the level of salinity in some seas, such as the Mediterranean Sea, is higher than in other parts of the other ocean. Some lakes, such as Mono Lake in California and the Caspian Sea in ...