ScienceIQ.com

What Makes a Frisbee Fly?

If you have ever been to the park or the beach, you've probably seen one of these plastic discs flying through the air. We're not talking about a UFO, we're talking about the Frisbee, more commonly known as the flying disc. What makes a Frisbee fly? Just like a bird's wing or the wing of an airplane, shape plays a large part in influencing the ...

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Frisbee
Astronomy

Introduction to Constellations

'Constellation' is the name we give to seeming patterns of starsin the night sky. 'Stella' is the Latin word for star and a constellation is a grouping of stars. In general, the stars in these groups ... Continue reading

IntroductiontoConstellations
Astronomy

The Devil's In The Details

Did you ever make a mistake converting English numbers to metric numbers? Let's hope that your mistake didn't cost anyone $125 million dollars. That's what happened to NASA. The Mars Climate Orbiter's ... Continue reading

TheDevilsInTheDetails
Medicine

Rocky Mountain Spotted Fever

Rocky Mountain spotted fever (RMSF) is caused by tiny bacteria called rickettsiae that live inside the cells of infected individuals. It has been reported throughout the United States, but is most ... Continue reading

RockyMountainSpottedFever
Engineering

Red Dot Replacing Cross Hairs

A bullet fired from a gun becomes subject to the pull of gravity and begins to fall the instant it leaves the gun barrel. The farther away from the gun the bullet travels, the lower to the ground it ... Continue reading

RedDotReplacingCrossHairs

I Am The Walrus

IAmTheWalrusThe walrus is a member of the pinniped family, which also includes sea lions and seals. Walrus differ from some seals in that they can turn their hind limbs forward. This characteristic enables them to raise themselves up, giving them greater freedom of movement on land. Two subspecies, the Atlantic and Pacific walrus, live in the arctic and subarctic regions of the Northern Hemisphere. The Pacific walrus is the largest. The walrus is covered by a thick layer of fat and a tough leathery skin with a thin layer of hair which is light brown on adults and almost black on young walrus. The walrus' head is small in comparison with its heavy, clumsy body, and the upper lip is thick and fleshy with a stiff moustache made up of bristles which are important sensory organs. Although there are other teeth in the upper jaw, it is the greatly enlarged canine teeth, called tusks, that give the walrus its distinctive appearance.

Walrus primarily eat species that dwell on the sea bottom, such as mollusks; salt worms; crabs, shrimp, and other crustaceans; and octopus. The walrus drags its tusks like sled runners along the sea bottom, rooting out buried prey with its snout and stiff facial bristles. Occasionally walrus may consume other pinnipeds such as spotted, ringed, and bearded seals. Tusks also serve as an indicator of social rank and may be used as protection. Sometimes, when a walrus wants to rest while still in the water, it will hook its tusks over the edge of an ice floe. Tusks may also be used to break up an ice floe to keep breathing holes open or to retrieve calves that have become stuck in the ice.

Walrus spend most of their lives at sea, although they frequently come out of the water, or haul out, onto ice floes or land to rest. They also leave the water to give birth to their young and to shed their hair. Keeping mainly to the moving ice packs, walrus migrate north in spring and south in winter. For thousands of years, the walrus was regarded by Eskimos and other Native people of the North as having supernatural powers and human attributes. It was also a natural resource of major importance to their culture. They obtained food and fuel from the walrus, as well as raw materials for making tools, shelter, boats, sleds, and clothing. The walrus was hunted for centuries by Russians, Americans, and others for its valuable ivory tusks and oil. In the United States, the walrus became a federally protected species with the passage of the 1972 Marine Mammal Protection Act.