The lesson introduces you to various types of teeth and their functions.

Гиганты Солнечной системы

This lesson introduces you to the outer planets of the Solar System, that is the giant...

Ядовита ли лягушка-древолаз?

Find out interesting facts about the anatomy of amphibians and their vital processes.

Планета в нашем саду?

The lesson illustrates the size of the planets in the Solar System and the huge distances...

Do reptiles ever get cold?

This lesson presents interesting facts about reptiles and their life.

How did humans conquer the air?

This lesson presents the most important milestones in the history of aviation.

Are all forests alike?

This lesson presents the different types of forests and their layers.

Space adventurers: Space travel

In this lesson you will learn about the presence of humans in space in the past, present...

Is glass a liquid or a solid?

A lesson about the special properties of glass, the process of glassmaking and the...

How do we see? The human eye

This lesson presents the anatomy of the eye, the mechanism of vision, and common vision...

The anatomy of the heart (intermediate)

This lesson introduces the position and anatomy of the heart, as well as the blood flow...

Let's measure time!

This lesson presents timekeeping devices and the types and units of time measurement.

The wave phenomena of sound

When does echo form? Why does sound spread easier at night? What is the secret to a good...

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