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320 Views

What Is the Origin of the Elements?

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

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260 Views

A Decade of Science

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.

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202 Views

Why can’t you divide a certain number by zero?

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?

1 Activities
309 Views

Coping with Coronavirus

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.

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198 Views

Music to the Ears

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?

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177 Views

The tree of life and common origin

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.

1 Activities
257 Views

How does climate change affect world vegetation ?

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

1 Activities
191 Views

Protein Structure

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.

1 Activities
244 Views

Vitamins: Why, how and how many?

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!

1 Activities
250 Views

Symbiosis – Cooperations in Nature

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.

213 Views

A Star of Toothpicks

Making self-forming stars using toothpicks – and what’s the connection to the Pharaohs?

112 Views

Build Your Own Love Meter

The liquid rises as we think about someone we love.

173 Views

Relight my Fire

Here’s a way to remotely light a candle that has just gone out, using the smoke rising from the wick.

193 Views

Science’s Fight for Life

A measles outbreak due to anti-vaxxer activity, questionable therapists showcased on TV and politicians who do not hesitate to lie and twist facts to serve financial interests. These are only some of the challenges that science had to face in 2018. Is this a lost war?

182 Views

Black-Marker Chromatography

A simple and visually impressive experiment reveals what a black marker’s color is really made of.

166 Views

Evolution by Hurricanes

The answer is blowing in the wind: For the first time, researchers have shown how hurricanes can affect the evolution of lizards –simply by casting those less capable of withstanding the powerful winds into the sea.

158 Views

The Animal’s Tool Box

From chimpanzees to crows, from dolphins to octopi: Different species of animals use tools around the world. Why did this ability develop in only a few species, and why them?

193 Views

Nursing Spiders and Cockroach Milk

Nursing and milk consumption are not exclusive to mammals. Birds, bugs, spiders, and even fish feed their offspring with milk-like liquids.

207 Views

The Structure of the Atom

The smallest particle of matter that retains its properties is called the atom.

119 Views

Mice with Character

חוקרים מישראל פיתחו דרך לחקור את תכונות האופי של עכברים באמצעות מעקב אחר התנהגותם. הם מקווים שהמחקר יוביל להבנה טובה יותר של הקשר בין גנים לאישיות גם אצלנו