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How do optical devices magnify the image of a distant or a very close object?
A lesson about the changes in the shape and function of windows from ancient times to the present day.
The muddy bottom of freshwater bodies provides home to numerous species.
Interesting facts about your intestinal system
A lesson about microorganisms commonly found in lakes, rivers and streams.
Learn about the golden ratio and about two geometry-based art styles.
Like most bird species, the great spotted woodpecker and the great tit live in the foliage of trees and shrubs.
How big are atomic nuclei and what do we know about them?
A lesson about Easter traditions throughout the world.
Learn how electromagnetic waves are generated and where we can encounter them.
What is the mysterious interaction that holds the components of a nucleus tightly together?
Let's see what happens when waves propagate from one medium to another.
Interference is one of the most spectacular wave phenomena.
Learn about the importance of the diffraction of waves in our everyday life.
Almost every musical instrument works based on the phenomenon of standing waves. What should you know about these waves?
In quantum mechanics, regularity and uncertainty are present at the same time. How is that possible?
Let's see what experiments can prove the validity of quantum mechanics.
In this lesson, you can learn about the plants growing in the shrub, the herbaceous and the moss layer of deciduous forests.
Why and how does the composition of atomic nuclei transform?
Tulips are popular ornamental plants. In this lesson, you can learn more about these beautiful plants.
Learn about the predominant art style of the 16th–18th centuries.
Where do humans encounter radioactive radiation and when do we need to protect ourselves from it?