Homo erectus

The ‘upright man’ used tools and could set fire.

Milky Way

The diameter of our galaxy is about 100,000 light years; it contains more than 100 billion stars, one of which is our Sun.

Edible frog

This animation demonstrates the anatomy of amphibians through the example of a common species of frogs.

Water supply system

The water supply system provides clean and safe drinking water for the consumers.

Traditional Eskimo lifestyle

Igloos were the typical dwellings built by Eskimos living in the Arctic zone.

Air pollution

This animation demonstrates the main sources of air pollution: agriculture, industry and urban settlements.

Ancient Greek pottery

The masterpieces of ancient Greek potters are important archaeological artefacts.

NAD⁺, NADP⁺, NADPH

NAD⁺ is a coenzyme that plays an important role mainly in catabolic processes, while NADP is important in anabolic processes as hydrogen carriers.

Comparison of real fruits and pseudofruits

The pericarp of real fruits develops from the carpel, while the pericarp of pseudofruits develops from other parts of flowers.

Jellyfish

Jellyfish are free-swimming marine animals, a species of Cnidaria, the most ancient group of Eumetazoans.

Sponge

The most ancient group of animals, they live underwater, lack real tissues and body symmetry.

Blood vessels

The three main types of blood vessels in the human body are the arteries, the veins, and the capillaries.

What is the time?

A game to practise the use of analogue and digital clocks.

Volume of a tetrahedron

To calculate the volume of a tetrahedron we start by calculating the volume of a prism.

Underground waters

Groundwater and aquifers are types of underground waters.

El Niño

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

Native American settlement (Crow Nation)

The Crow are Native Americans who inhabited the Yellowstone River valley.

Horse chestnut

This animation demonstrates how horse chestnut trees change throughout the seasons

Attack of Pearl Harbor (1941)

The United States entered World War II after the devastating attack by the Japanese navy.

Types of synovial joints

Synovial joints can be categorised by the direction of movement they allow.

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