The Macedonian Empire

The legendary ruler and military leader, Alexander the Great, established a vast empire.

Provinces and settlements of Ancient Rome

This animation presents the history of Ancient Rome throughout the centuries.

The countries of the Americas

Learning about the geographic location, capitals and flags of American countries through exercises in three levels of difficulty.

Cellulose (C₆H₁₀O₅)n

The building material of the cell walls and fibers of plants.

Scots pine

One of the most common tree of the pine family, native to Eurasia.

Modern empires

Numerous legendary empires were built (and destroyed) in the course of history.

Legendary medieval empires

Numerous legendary empires were built (and destroyed) in the course of history.

Legendary ancient empires

Numerous legendary empires were built (and destroyed) in the course of history.

V-2 ballistic missile (1944)

The German liquid-propellant rocket, developed during WWII, was the first known man-made object to reach space.

Continental drift on a geological timescale

The Earth's continents have been in constant motion during the history of the planet.

Supermarine Spitfire (United Kingdom, 1938)

Spitfire was a legendary British single-seat military aircraft used in World War II.

Uranus

Uranus is the 7th planet from the Sun, a gas giant.

Spider silk, spider web

While the density of spider silk is less than that of nylon filaments, its tensile strength is greater than that of steel.

Tanning, skin cancer

The topmost layer of our skin is the epidermis, which contains melanocytes.

How does it work? - Ballpoint pen

The invention of the ballpoint pen made writing a lot easier.

Northern white-breasted hedgehog

The Northern white-breasted hedgehog rolls into a ball to protect itself.

Hero’s aeolipile

Hero of Alexandria is the inventor of the first steam engine, although he regarded it as an entertaining toy.

Paleolithic cave

The first dwellings in human history provide a lot of information about the lifestyle of our ancestors.

Passive house

In a passive house a comfortable inner temperature can be ensured without the use of traditional heating and cooling systems.

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