Plants, animals, or minerals found in nature bear almost every color imaginable. There are two factors that influence what hues you see in the wild: physics and evolution. So, which colors are you least likely to see in the natural...

You may have satisfied your inner five-year-old by learning why the sky is blue, but where does the ocean's color come from?

Lighting architect Rogier van der Heide offers a beautiful new way to look at the world -- by paying attention to light (and to darkness). Examples from classic buildings illustrate a deeply thought-out vision of the play of light around...

SciShow News explores new research in the world of food, including insights into what causes food addiction, and how a certain flavor might be good for your health.

Your eyes don’t always capture the world exactly as a video camera would. But the eyes are remarkably efficient organs, the result of hundreds of millions of years of coevolution with our brains. Michael Mauser outlines the similarities...

You might have heard that exposure to unnatural lights from digital devices can hurt your eyes. But is that true?

When scientists are planning missions, they sometimes have to take into account the fact that the light from the Sun pushes on the spacecraft. But with solar sails, they can also use that pressure to propel the craft along.

SciShow explains how three important ingredients -- sunlight, water, and you -- interact to create the illusion of a rainbow. The colorful details are inside!

For most of us, our bodies are interacting with phones nearly all the time, whether we're looking at screens, listening to music, or carrying them in our pockets. If you are wondering about the health implications of a world filled with...

There's a lot about sleep that we don't understand, like why we even sleep in the first place, for example. Here are some amazing discoveries biologists have made while trying to solve the mystery of sleep.

Among living things, the color blue is oddly rare. Blue rocks, blue sky, blue water, sure. But blue animals? They are few and far between. In this video, we'll look at some very cool butterflies with Bob Robbins, Ph.D. from...

Ed Boyden shows how, by inserting genes for light-sensitive proteins into brain cells, he can selectively activate or de-activate specific neurons with fiber-optic implants. With this unprecedented level of control, he's managed to cure...

Howcast - Learn how light therapy is used to treat acne from dermatologist Cybele Fishman, MD in this Howcast skin care video.

Pupil outcome: I can explain the importance of a good night's sleep. Key learning points: - Sleep is important for our bodies to repair, develop and grow. - We should aim to have between nine and twelve hours of sleep every night. - A...

Aerogels are the world's lightest (least dense) solids. They are also excellent thermal insulators and have been used in numerous Mars missions and the Stardust comet particle-return mission. The focus of this video is silica aerogels,...

The atmospheric composition of the sky affects the colours we see. From blue horizons to red sunsets, why do we see colours the way we do? Physics - Our Solar System - Learning Points. Light is made up of different wavelengths. Our...

Find out why the sky is blue.
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A recent headline sounded the alarm about a study that found that smartphone use was related to the early onset of puberty in children. This headline was a real triple threat: fear of technology, children under threat, and sexualization...

The CompTIA A+ exams will challenge you on monitor troubleshooting. Whether it's simply changing the input or replacing a burned-out bulb, troubleshooting displays is critical for techs.
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Uncover the alarming link between nighttime vulnerabilities, suicidal ideation among youth, and the presence of family-owned firearms. Delve into the impacts of disrupted circadian rhythms and the quiet of evening hours. This video...

Guess the pattern and say what comes next

How does light work for sleep? Light has a strong influence over the timing of your circadian rhythm. Light triggers the shut down of melatonin in your brain. So we can use this to our advantage when trying to regulate sleep...