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The idea that sugar affects behaviour is widely believed and there are various hypotheses that attempt to explain how, including some children might have an allergic response to refined sugar, or have abnormal patterns of blood glucose levels.

Your eyes are at work from the moment you wake up to the moment you close them to go to sleep. They take in tons of information about the world around you — shapes, colors, movements, and more. Then they send the information to your brain for processing so the brain knows what's going on outside of your body.

People say “in the blink of an eye” because it’s the fastest muscle in the body

Birds have many physical features, besides wings, that work together to enable them to fly. They need lightweight, streamlined, rigid structures for flight. The four forces of flight – weight, lift, drag and thrust – affect the flight of birds.

Flying birds have: lightweight, smooth feathers – this reduces the forces of weight and drag a beak, instead of heavy, bony jaws and teeth – this reduces the force of weight an enlarged breastbone called a sternum for flight muscle attachment – this helps with the force of thrust light bones – a bird’s bones are basically hollow with air sacs and thin, tiny cross pieces to make bones stronger – this reduces the force of weight a rigid skeleton to provide firm attachments for powerful flight muscles – this helps with the force of thrust a streamlined body – this helps reduce the force of drag wings – these enable the force of lift.

Color originates in light. Sunlight, as we perceive it, is colorless. In reality, a rainbow is testimony to the fact that all the colors of the spectrum are present in white light. As illustrated in the diagram below, light goes from the source (the sun) to the object (the apple), and finally to the detector (the eye and brain).  

Zoos are premises for the captivity of animals, often in urban areas where many of the animals would not otherwise be found, with the intention of studying the animals and displaying them to the public at large. The predecessor of the zoo was the menagerie, which involved the captivity of birds typically for the entertainment of the aristocracy, and has a long history running back to ancient times. The first modern zoo evolved out of an aristocratic menagerie in Vienna in 1765. Many types of zoo now exist, from the petting zoos that encourage the public to get up and close with the animals to the large nature reserves that provide space for the animals to roam around within and most famously the large, urban zoos like the London Zoo which include elephants, lions and penguins and are usually notable tourist drawcards for the cities concerned. Proponents argue that zoos are beneficial both to the animals themselves, protecting endangered species with specific breeding programs, and the public, as an educational tool to increase both awareness and understanding. Opponents respond that the removal of wild animals from their habitat is wrong, that they should be left in their natural surroundings and not used as tools for public entertainment. (shamelessly taken from our sister site idebate.org)

Eye color is the result of variations in the amount of melanin, a pigment found in the front part of the iris of the eye.  The lack of this pigment results in blue eyes, some pigment gives green and lots of pigment gives brown eyes.   So light brown eyes just have a bit less melanin than darker brown eyes.  All of the different shades of eye color happen the same way.  Blue-green eyes have an amount of melanin between green and blue, hazel eyes have an amount of pigment between green and brown, etc.  

Recent surveys show that children spend an average of 49 minutes a day on these games. If a child’s video-game console is in the bedroom, play time increases dramatically, to nearly three hours.

Video games hold special attractions for children with ADHD.

When a child strikes out in a baseball game, he’s doing it in front of a crowd of peers. But when he makes a mistake while playing a video game, no one else has to know.

Zoos are premises for the captivity of animals, often in urban areas where many of the animals would not otherwise be found, with the intention of studying the animals and displaying them to the public at large. The predecessor of the zoo was the menagerie, which involved the captivity of birds typically for the entertainment of the aristocracy, and has a long history running back to ancient times. The first modern zoo evolved out of an aristocratic menagerie in Vienna in 1765. Many types of zoo now exist, from the petting zoos that encourage the public to get up and close with the animals to the large nature reserves that provide space for the animals to roam around within and most famously the large, urban zoos like the London Zoo which include elephants, lions and penguins and are usually notable tourist drawcards for the cities concerned. Proponents argue that zoos are beneficial both to the animals themselves, protecting endangered species with specific breeding programs, and the public, as an educational tool to increase both awareness and understanding. Opponents respond that the removal of wild animals from their habitat is wrong, that they should be left in their natural surroundings and not used as tools for public entertainment. Show less

The ocean is also salty from rainwater that falls onto rocks or land, picks up some salt in the earth, and then trickles down into the ocean! There are also some places in the ocean floor where salty gases and minerals from within the Earth get released into the ocean!