41 an Albino is an animal (or a person) that is born without any color. Albinos have pale, whitish fur, feathers, or hair, and eyes. Albinos are very rare in nature because they usually do not live very long. one reason for this is that they often become blind and cannot take care of themselves. Another reason is simply the color. in most regions, a white animal
42 in 1990, 80,000 pairs of Nike athletic shoes fell off a ship in the Pacific Ocean. Ocean scientists were very interested when they heard about this. they asked anyone who found a pair of these shoes to report the finding so they could learn where the shoes landed. in all, 1,300 pairs of shoes were reported along the coast of the united states and canada. these reports gave the scientists important information about
43 for centuries, men who work as coal miners have had many health problems. the worst of these problems is a disease called "black lung" which is caused by the coal dust in the mines. until very recently, about one in every five miners in the united states got this disease. for these men, it meant poor health and a shorter life. then, in 1969, a new law forced the coal companies to improve the working conditions for miners. since then