or log in with
Noise surrounds us everywhere, but it can be harmful. Let's see how.
This lesson helps you understand the process of hearing.
Let's make musical instruments.
This lesson introduces some basic ideas about sound.
In this lesson you will learn about the basics of speech perception and language acquisition.
This lesson presents the development of human speech and the structure and functioning of the organs of speech.
Find out interesting pieces of information about the communication of animals.
A lesson about the benefits and limitations of genetic engineering.
Simple, straightforward information about the coronavirus epidemic.
Let's find solutions to the global environmental issues!
In the lesson, you will learn how many minutes of running uses up the energy that a chocolate bar gives you.
The Renaissance, which originated in Italy, was inspired by Ancient Greek and Roman art.
In this lesson, you can learn about the famous Russian writer.
In this lesson, you will find answers to questions about the pressure of solids, liquids and gases.
In this lesson, you can learn about various herbs and spices.
A summary of the physics of waves for high school students.
How to reduce energy use at home
The theory of relativity explained like you've never seen before.
This lesson presents the European garden spider and the castor bean tick, two species that live at the shrub level of temperate forests.