How We See: The First Steps of Human Vision

Genetic variation makes for stronger species, but for a mammalian species, humans are disturbingly closely related. Help your class explore human ancestry and genealogy using the 15th video in a 16-part series. It describes how we became...

What should you do if you are studying for a test and your glasses break? The video introduces an easy way to instantly improve your vision. It discusses why it works and the physics behind vision, lenses, and focus.

Can you eyes be fooled into seeing colors that aren't actually there? Budding scientists view a presentation that addresses this topic. They explore how their eyes interpret color through the retinas and messages sent to the brain. They...

I can see your epidermis. A short video shows how we get our skin color. It explains how melanocyte cells in the epidermis produce melanin, and that the type and amount of melanin controls skin color.

Being able to absorb the abilities of other life forms may seem like something taken from a superhero movie, but sometimes reality is stranger than fiction. Join the narrator as he takes viewers back billions of years to investigate how...

Humans can only see visible light, but some insects can see ultraviolet light. Through a simulation, pupils explore how we see colors using one bulb. It moves on to demonstrate how we see colors by mixing three different bulbs (red,...

Is our skin color determined only by genetics? Explore skin science through a video and related interactive. Young biologists discover the cells of the epidermis, how melanin is made, and the factors that influence the outward appearance...

What have our eyes and brains evolved to see? Discover the way our photo receptors and brains assemble visual information into the three-dimensional world we see around us.

The deadly smallpox virus, which killed between 300-500 million people in the twentieth century alone, is a feature player in modern world history. Discover how this disease spread across the globe by and through various nations...

With so indescribably many stars and planets in existence, certainly we aren't alone in the universe! Or are we? Strangely, we haven't discovered any hints of life beyond Earth. The contradiction, known as the Fermi paradox, is...