How does it work? - Vacuum cleaner

The vacuum cleaner creates a partial vacuum...

The adrenal glands

The adrenal glands are responsible for...

How does it work: PET-CT

By positron emission tomography (PET), we can...

The first days in school

Learn the concept of colours, numbers, letters...

Unmanned aerial vehicles (UAV)

The range of applications of unmanned aerial...

Ictíneo II submarine

The submarine designed by the Spanish inventor...

Bacteria (advanced)

Bacteria are unicellular organisms that have...

Legendary buildings

A selection of legendary buildings from the...

Navigational instruments of the past

Several ingenious instruments have been...

Deep Sea Hydrothermal Vents

A hydrothermal vent is a fissure in the...

Gravitational waves (LIGO)

Massive accelerating or orbiting bodies cause...

Types of waves

Waves play an extremely important role in many...

Ukrainian Cossack (17th century)

Cossacks, members of independent military...

German alphabet game

Practise the German alphabet and form words...

Rimac Concept One

Rimac Automobili's first model is known as the...

English alphabet game

Practise the English alphabet, build words...

Blood vessels

The three main types of blood vessels in the...

American bison

The American bison is the largest land animal...

Great Mosque of Djenné (1907)

The mosque, built in a distinctive...

The history of human migration

The migration of large human populations began...

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