How do reindeer survive in the extreme cold? Most animals don't eat moss. It's hard to digest, and it has little nutritional value. But reindeer fill up with lots of moss.Why? The moss contains a special chemical that helps reindeer keep their body fluids warm. When the reindeer make their yearly journey across the icy Arctic region, the chemical keeps them from freezing - much as antifreeze keeps a car from freezing up in Winter.
Bears whose brown fur is tipped with lighter-colored hairs are called grizzly bears. The smallest species of bears are called sun or Malayan bears. Male bears are called boras. Bears are native to the continents of North America, Asia, Europe, and South America. Alaskan brown bears, world’s largest meat-eating animals that live on land, can weigh as much as 1,700 pounds(771 kilograms).
Glue dates back to prehistoric times. Artists once mixed coloring with raw eggs, dried blood, and plant juices to make sticky paints for cave murals. Later, ancient Egyptians and other people learned to make stronger glues by boiling animal bones and hides. Today companies make glues using synthetic substances.
A Zipper joins two pieces of material together. A zipper is used everywhere, on clothing, pencil cases, boots and suitcases, wallets, and a zillion other things. Everyone thinks it was Whitcomb Judson who invented the ziper but it was really Elias Howe. Elias was so busy inventing the sewing machine that he didn't get around to sellig his zipper invention which he called a "clothing closure".
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