Балистична ракета V-2 (1944г.)

Германската ракета с течно гориво, разработена през II-рата Световна война, е първият...

Inca warrior (15th century)

The Incas´ rudimentary weapons were inadequate in their struggle against the Spanish...

Pteranodon longiceps

A prehistoric flying reptile, similar to birds. However, there is no direct evolutionary...

AH-64 Apache (USA, 1975)

The Apache attack helicopter, named after an American Indian tribe, was developed for the...

Water turbine, generator

Water turbines convert the kinetic energy of water into electric current.

Reaction of ammonia with hydrogen chloride

Ammonium chloride is the result of the reaction of ammonia and hydrogen chloride

Location of origin of livestock and crops

Domesticated animals and crops originate from various parts of the world.

El Niño

A periodic climate pattern that occurs across the tropical Pacific Ocean every five years.

Teatro Olimpico (Vicenza, 16th century)

The first indoor theatre in modern history to be constructed according to the...

Fat molecule

Three saturated fatty acid molecules linked to a glycerol molecule.

Bireme (ancient oared warship)

A bireme is a type of ancient warship, with a characteristic pointed bow and two decks of...

Woolly mammoth

Extinct proboscidea closely related to today's elephants, often hunted by prehistoric man.

Venus

Venus is the 2nd planet from the Sun, the brightest object on the night sky (after the Moon).

Submarine operation

Submarines submerge and surface by changing the average density of the hull.

Types of bridges

Types of bridges include beam-, arch-, suspension-, cantilever and truss bridges.

Secondary structure of proteins

Polypeptide chains are composed of amino acids and can appear in alpha-helix or...

Aerodynamic lift

Due to their asymmetrical profile of the wings, lift is produced while flying at a high...

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