The following video presents the causes of acne, different possible symptoms, and common medical treatments.

In this video, the students will watch a reaction that is very difficult to carry out in a lab: a reaction between cesium and fluorine, and will answer questions related to the two elements in the reaction and to the reaction product

Wind has always been used as an energy source, whether for wind-powered sailboats or flour mills. As an energy source, it is endless. It is also used nowadays for electricity production. Its basic principle is quite simple, and is actually similar to hydraulic power stations: The wind turns a turbine, which spin magnets that produce electricity.

This video explains two important topics in quantum mechanics.

When we tell someone who is unwell “It is all in your head”, we rarely suspect the extent to which this is true. The world of medicine in recent years has started to obtain a better understanding of the phenomenon known as “the placebo effect” – a situation in which treatment with a false medicine leads to an actual improvement in the health condition.

Beyond endless lists of numbers, statistics enable us, when the data is presented visually, to draw far-reaching conclusions. In the following video, Kim Preshoff presents population pyramids – a visual representation of the population data of a country. He shows population pyramids of various countries and how these pyramids allow us to learn about the countries’ past and predict what the future may hold for them.

Watch the video and discover how many piano tuners are there in Chicago and how you can reach the solution.

It has been 38 years since the World Health Organization (WHO) announced the eradication of a disease that killed hundreds of millions of people in the 20th century alone, and apparently destroyed entire civilizations in the new world.

Despite the disdain they evoke for some of us, researchers see insects as the new superheroes that will save the world from starvation. Are they really a practical alternative to meat?

What do sunflowers and pinecones have in common with rabbits? What do they all have to do with math? Watch this video from Scientific American’s Instant Egghead series and discover the answer!

There are a little over one hundred elements in the universe. How were they created?

Genetic sequencing technologies have led to another revolution – the understanding that the “guests” that live in our body affect almost every aspect of our lives.

The complete phrasing of the question: Why can’t you divide a certain number by zero? Supposedly, the meaning of dividing by zero is that you do not divide the number (you “divide” it to 0 sets…) and so the result should be the same as the number divided?

What can you do to reduce your risk of infection? How would you know if you are infected, and what should you do if you find that you are? When will a vaccine be available? Read on for some useful tips.

In honor of the Eurovision Song Contest, let’s get to know some of nature’s singers. How do birds learn to sing? How does a whale sing? And can a fish serenade his love?

It was over a century and a half ago that Charles Darwin published his revolutionary book “On the Origin of Species”. However, the genetic evidence that substantiate his theory of evolution was revealed many decades later. Nowadays, by virtue of their genetic analysis capabilities, scientists can calculate the genetic proximity between species and thereby place them on the evolutionary “tree of life”. The following video depicts how life began on Earth and leads us through a journey from the first cells to human beings, all based on our current genetic knowledge.

A video clip about how climate change affects vegetation and how plants affect the carbon cycle.

In terms of their chemistry, proteins are chains of amino acids. Proteins are an important ingredient in our diet, and are used by the body to build itself. Biologically, proteins play an important role as the enzymes driving many physiological processes. In essence, proteins are the workers driving all biological processes. The following video clip describes proteins’ chemical structure and explains basic concepts in chemistry.

The first thing that usually comes to mind when people hear the word “vitamins” are the small and colorful pills that come in a container, to be taken with or after a meal. Why? Because grandma said so – and grandma is always right!

In the living world all creatures are connected, in one way or another, in a complex network of different types of relationships. These relations could be parasitic, predator-prey relations or a symbiosis between two creatures.