obiloworldwide | Health, Scholarship & Entertainment

When most people think of rodents, automatically mice and rats come to mind. However, nearly 40% of mammal species are rodents, and they are found on every continent except Antarctica. Rodents include mice, rats, squirrels, chipmunks and beavers, among others. A very detailed list can be found at this website: http://animals.howstuffworks.com/mammals/rodents.htm .   The approximately 4,000 rodent species are divided on the basis of their anatomy into three well-defined groups, or suborders, and more than 30 families. The Sciuromorpha, or squirrel-like rodents, include the various species of squirrel, chipmunk, marmot, woodchuck (or ground hog), prairie dog, gopher (or pocket gopher), pocket mouse, kangaroo rat, and beaver. The Myomorpha, or mouselike rodents, include a great variety of mouse and rat species, as well as species of hamster, lemming, vole, muskrat, gerbil, dormouse, and jerboa, according to InfoPlease.com. This is the largest rodent group. The Hystricomorpha, or porc...

Women and teens cannot get enough of it. Married men fear it on their shirt collars. Store shelves are stocked with it by the case. Celebrities hawk it on commercials non-stop on television, magazine ads, and billboards; and billions of dollars per year are spent on acquiring it. The ancient Egyptians were the first recorded people to use it, and people have been enhancing their lips with it for thousands of years. Lipstick by definition is a cosmetic used to color lips, usually crayon-shaped and packaged in a tubular container. No individual inventor can be credited as the first to invent lipstick as it is an ancient invention; however, the history of the use of lipstick and credit individual inventors for creating certain formulas and methods of packaging, according to this website: http://inventors.about.com/od/lstartinventions/a/Lipstick.htm . The actual term "lipstick" wasn't first used until 1880. However, people were coloring their lips long before that date. Up...