Convincing a predator to attack you might seem like a bad idea, but Trinidadian guppies have a whole bag of evolutionary tricks to help them do just that. But why do they do it, and how does it help them survive?

Kids are weird. They eat mud, talk to bugs, and stick things up their noses... but the changes kids go through as they grown out of infancy and into childhood are even weirder!

Explore one of the most fascinating processes plants can do: photosynthesis! In this Amoeba Sisters updated photosynthesis video, you will find a general overview of the light dependent and light independent reactions (Calvin Cycle) and...

All mammals have hair at some point in their lives, but none of them wear it quite like humans. Why does our hair grow where it does, and not grow where it doesn't? How does our hair get its color? And why does it go gray and often fall...

Paul Andersen explains how pigments can be separated using chromatography. He shows how you can calculate the Rf value for each pigment. He then explains how you can measure the rate of photosynthesis using leaf chads and water...

Changing colors -- it’s not just for chameleons! Many species of octopuses, squid and cuttlefish can do it, as well as a few insects, and even mammals and birds. Find out what feats of biology different animals use to change their...

The earliest recorded tattoo was found on a Peruvian mummy in 6,000 BC. That's some old ink! And considering humans lose roughly 40,000 skin cells per hour, how do these markings last? Claudia Aguirre details the different methods,...

Why are tattoos permanent? How do you deliver the ink? And how do you remove a tattoo if you no longer want it?

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...

Why Does Our Hair Turn Gray?

This video examines the process used to create the woodblock print Under the Wave by Katsushika Hokusai.

Howcast - Stop bemoaning your blotchy complexion and start evening it out instead, no matter your specific skin complaint.

Howcast - Learn how to apply shimmer and highlights in this makeup tutorial from Howcast.

Howcast - Learn how to do a sultry smokey eye in this eye makeup tutorial from Howcast.

Making your own oil paints is a lot like growing your own vegetables — homemade is always better than store-bought.

Trace the evolution of fake blood from simple tricks to complex recipes in filmmaking.

Hair resists decay even after death due to keratin, a structural protein. The structure and chemical composition of keratin make it difficult for organisms to break it down. Hair outlasts most other soft tissues due to the insoluble and...

Zebras are actually black with white stripes. All animals get their colors from pigments called melanin which are of two kinds - eumelanin gives a black to brown color which pheomelanin gives reddish to yellow hues. The cells that create...

Chameleons dont change their color for camouflage, as most people think. They cant perfectly match your crazy pink curtains or blend into your blue couch. As much as Pascal from Disneys Tangled might change his colors on whim, alas, that...

A dry coloured substance that can be used to give colour to paints, plastics and other materials.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise...

The story of how a contaminated reaction in the early 1700s led to the accidental discovery of blue pigment, the first synthetic paint. Chemistry - Reactions - Learning Points. In the 1700s, paints were colored using naturally occurring...

Throughout the year, some leaves change colour from green, to yellow, to red. Discover the role chlorophyll, carotene and anthocynanin pigments play in making this happen. Chemistry - Reactions - Learning Points. Leaf colour depends on...

We separate the different pigments in a beech leaf using chromatography. The leaf is broken up and ground with sand and propanone before being transferred to some chromatography paper. This is then lowered into pigment solvent and we can...

The world is familiar with classical icons such as the Parthenon in Athens, but recent research suggests that both the ancient Greeks and the Romans saw their marble treasures very differently from the way we see them today. Close...