Hydroelectric power

The use of water in the generation of electricity at plants where the turbine generators are driven by falling water. Hydroelectric water use is classified as an instream use in ...

Siege of Leningrad

History; World history

The Siege of Leningrad, also known as the Leningrad Blockade, was a prolonged military operation resulting from the failure of the German army to capture the city of Leningrad ...

Hermitage Museum

History; World history

The State Hermitage is a museum of art and culture in Saint Petersburg, Russia. It is one of the largest and oldest museums in the world, founded in 1764 by Catherine the Great ...

Seven Years’ War

History; World history

The Seven Years’ War was a global military war between 1756 and 1763 involving most of the great powers of the time and affecting Europe, North America, Central America, West ...

Moctezuma's headdress

History; World history

Moctezuma's headdress is a feather-work crown, which at one time was believed to have belonged to the Aztec emperor, Moctezuma II. The feathers are arranged in a semicircle with a ...

Darwin

History; World history

British scientist whose theory of evolution popularized the idea that the variety of life on Earth developed gradually over millions of years.

HadeanTime

History; World history

The period of time during the history of the Earth starting about 4.6 billion years ago and ending about 3.8 billion years ago.

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Industry/Domain: Animals Category: Fish

Killer shrimp

The killer shrimp is also known as dikerogammarus villosus. It can grow up to 30 mm long and have traditionally inhabited the steppe region between ...