What are lichens made of?

A combination of fungal hyphae and algal cells viewed under a light microscope at a hundred times magnification.

Rapid and slow combustion

This video is about the characteristics of and differences between rapid and slow combustion.

The green-winged macaw

A brightly coloured and extremely loud parrot whose screams can be as loud as 110 dB. In humans, long-term exposure to sounds of such intensity can cause...

Giant rivers at the Equator

The largest rivers on Earth are found in the tropical zone.

Do walnuts burn?

The energy released by the burning walnut is used to heat water.

Raven training

Ravens are considered the most intelligent birds, displaying high learning ability and use of logic in solving problems.

Breaking glasses

Entropy is present in all processes of life, from physics to chemistry, from architecture to biology.

The lungs of the Earth Tropical Rainforests

Tropical rainforests play an important role in regulating the Earth climate.

Production of hydrogen gas

Let’s make hydrogen gas using zinc powder and hydrochloric acid and see what lays the foundations for hydrogen-fuelled cars in the distant future.

Chemists in the Arctic

We are in the northern reaches of Norway. This place will be home for three weeks to this team of chemists from Central Europe.

High Tatra Mountains

This fold mountain range is the highest section of the Carpathian Mountains, but the smallest range in the world by area. Its highest peak is the...


In the mountains of Greece, monasteries were built on top of steep rocks. These monumental works are part of the world heritage today.

Tortoises mating

How do tortoises mate with each other having those giant shells? It might be hard to imagine at first, but if you watch this video, you’ll see.

Upside-down glass of water

This video demonstrates that the force resulting from air pressure acts upwards too.

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