Topic: blue

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The Link Between Japanese Samurai and Real Indigo

Real indigo-dyed clothing is not like the blue you know. Richer than the chemical blues used on most fabrics today, real indigo dye comes from a plant and has a surprising range of qualities: on fabric it is antibacte...

Why Is Blue So Rare In Nature?

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. And the ones that do make blue? They make it in some very strange and special ...

Go inside an ice cave to see nature’s most beautiful blue

Where do glaciers and icebergs get their beautiful blue color? This unique blue might be nature’s most brilliant, and the color arises in a very special way thanks to some surprising interactions between light and wat...

Colorscope, an exploration of color across cultures

How do different cultures perceive and use color? Colorscope touches upon those perceptions and uses throughout history in this series of videos from CNN Creative, written and narrated by British art historian and bro...

Kawah Ijen volcano & The Mystery of the Blue Flames

Nature photographer Olivier Grunewald and cameraman Régis Etienne first traveled to East Java's 8,660 foot tall (2,600 meter) Ijen volcano in 2008, returning several times to capture Le Mystère des Flammes Bleues, th...

How (and Why) Do Chameleons Change Color? – Veritasium

There is a misconception about chameleons... that they change their color in order to blend in with their environment. That is actually not the case... So why do chameleons change color and how are they doing it? ...

What Gives the Morpho Butterfly Its Magnificent Blue? – Deep Look

What does it mean to be blue? Let's look deep into something called structural coloration, the physics of light, and how it's possible that the Morpho butterfly's wings appear to be blue, despite their containing no b...

Three Primary Colors – Sesame Street & OK Go

Three Primary Colors (2012): File this instant Sesame Street classic by OK Go under "super-catchy song that we sang all day today". In the archives, watch more excellent vids from Sesame Street and OK Go.

Why Is The Sun Yellow and The Sky Blue? – MinutePhysics

Why is the sun yellow and the sky blue? Why can we see the stars at night? Why is space black? And why is the sky more red, orange, and even pink at sunset? In this Minute Physics episode, we leap into "the grand ball...

The brightly-colored Achrioptera fallax stick insect

Achrioptera fallax is a stick insect species found in Madagascar. The males are a bright electric blue (with greenish tints) and have two rows of reddish orange spines along the edges of the femur. There are also d...


 
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