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Chicken egg colours explained
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It's a common knowledge that different breeds of chickens lay different colored eggs. Here I'll explain what chemicals and conditions give rise to these differences. White eggsAll eggshells are made of calcium carbonate and the white ones have no pigment added.Brown eggsThe brown colour is caused by protoporphyrin IX, from the hen's haemoglobin, and is coated on the outside of the egg as it moves through the oviduct.Blue eggsBlue eggshells have the pigment oocyanin, which does permeate the shell, so the blue coloring will be all the way through.Green eggsIf a brown layer and a blue layer are crossbred, chances are you will get a green egg when the protoporphyrin IX layer is deposited over the blue oocyanin shell.Pink eggsThe pinkish tint ...
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1537 |
bio_man |
6 years ago |
Fruity pebble colored rocks
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Opals (shown above) are is a hydrated amorphous form of silica (SiO 2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Because of its amorphous character, it is classed as a mineraloid, unlike crystalline forms of silica, which are classed as minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt. Opal is the national gemstone of Australia. The internal structure of precious opal makes it diffract light. Depending on the conditions in which it formed, it can take on many colors. The one pictured on the left is called the "Virgin Rainbow" opal, being the finest ...
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11202 |
duddy |
7 years ago |
Peacocks look even more awesome when they fly
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Peacocks can easily fluttered into the air, but only up to a limited gap. Unlike other birds, they cannot prolong their flight, but these small drifts come in handy while scavenging for food, and are extremely important in escaping deadly killers. As soon as any predator approaches them, they ascend to a nearby tree for safety (check out the video below). ...
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5344 |
duddy |
8 years ago |
The rainbow eucalyptus tree has its name because of its vibrant colored bark
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Eucalyptus deglupta, commonly called rainbow eucalyptus, is a very large, fast-growing, broadleaved evergreen tree that is native to moist humid tropical forested areas with high rainfall in New Guinea, Indonesia and the Philippine Islands (Island of Mindanao). It is perhaps best noted for its smooth orange-tinted trunk bark which peels in summer to reveal a unique and sometimes stunning multi-colored bark (as described by the common name of rainbow eucalyptus) consisting of streaks of pale green, red, orange, gray and purple-brown. ...
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26125 |
duddy |
9 years ago |
How many colours do you see?
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You see those embedded spirals of green, pink and blue? The green and blue spirals are actually the exact same colour. When the green and pink colours are placed side-by-side, they enhance each other’s darker tones, making them look like completely new colours. How we perceive colours is dependant on the light and shadow surrounding them and on the placing of contrasting colours side by side.
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3662 |
duddy |
10 years ago |
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