Legendary primatologist Jane Goodall says that humanity's survival depends on conservation of the natural world. In conversation with head of TED Chris Anderson, she tells the story of her formative days working with chimpanzees, how she...

How Modern Light Bulbs Work

In this video Paul Andersen describes some of the properties of electromagnetic radiation. The electromagnetic spectrum varies by wavelength from radio waves to gamma rays. We only see a portion of the spectrum known as visible light. ...

Next stop in our tour of your sensory systems? VISION. With a little help from an optical illusion, we take a look inside your eyes to try to figure out how your sense of vision works -- and how it can be...

Fabric brighteners can liven up your old, faded clothing. But they don’t actually clean your clothes, and they’re often banned in the military!

Biology textbooks are full of drawings of DNA, but none of those show what DNA actually looks like. Sure, they're good models for understanding how DNA works, but inside of real cells, it's a whole lot more interesting. Learn why we...

In this video Paul Andersen details the waves in electromagnetic radiation. There is an inverse relation between the wavelength and frequency of electromagnetic waves. Electromagnetic radiation includes gamma rays, x-rays, infrared...

Paul Andersen explains how natural selection is a major mechanism in evolution. The video begins with a discussion of Charles Darwin and the details of natural selection. The data of the peppered moth during the industrial revolution...

Paul Andersen describes our place on the Earth in the Solar System within the Milky Way Galaxy in the Universe. The make-up and origins of the Universe are included along with stellar evolution. A teaching progression K-12 is also...

Each kind of light has a unique wavelength, but human eyes can only perceive a tiny slice of the full spectrum -- the very narrow range from red to violet. Microwaves, radio waves, x-rays and more are hiding, invisible, just beyond our...

On January 30, 2020, we had to say goodbye to NASA’s Spitzer Space Telescope after more thank 16 years of revolutionizing infrared astronomy. Today, SciShow sends it off and says thank you by taking a look back at it’s incredible legacy.

Are Neutrinos useless? Would we exist without neutrinos? What are neutrinos? And what purpose do they serve? Where do Neutrinos come from?



They are the second most abundant particles after photons. They do...

When Ernest Rutherford realized that atoms have a heavy nucleus, he hypothesized that the way the moon orbits earth is the same as the way an electron orbits the nucleus of atoms. We now know an atom would...

Have you ever wondered what are X-rays used for in medicine? And how do they work? Are X-rays dangerous? In this video, we will be answering all the lingering questions you may have about this popular medical imaging technique.
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Electromagnetic waves are fundamental to understanding the nature of light and are oscillations of electric and magnetic fields that travel through space, carrying energy from one place to another. The spectrum of light is a...

Radio Astronomers discovered hundreds of Quasars hiding in our galaxy.

How viewing Jupiter in infrared and ultraviolet can uncover its secrets.

Where is the centre of the universe? Where do astronomers look in space to see where the Big Bang originated?

A black body is a theoretical or imaginary object that perfectly absorbs all incoming electromagnetic radiation, and also emits radiation, like heat and visible light, based on its temperature. A black body is considered theoretical...

Wi-Fi signals can penetrate walls using radio waves in the frequency range of 2.4GHz or 5GHz. These wavelengths are small enough to pass through cracks and openings in walls. WiFi signals also reflect off objects, allowing the signals to...

Electromagnetic radiation with a slightly longer wavelength than visible light, between about 700 and 1050 nanometres.
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A wave with both magnetic and electrical field components, which oscillate perpendicular to each other.
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Capable of transmitting light, or more generally something that allows radiation to pass through relatively unhindered.
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Electromagnetic radiation in the region of the spectrum between visible light and x-rays, about ten to 400 nanometres in wavelength.
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Glossary Film.
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