They were once called chiffoniers, then ragpickers, then junk dealers; now they are secondhand clothes dealers. Since biblical times, people have worked for food, clothing, and shelter. They still…
WHAT ARE BACTERIA AND VIRUSES? WHAT ARE GENETIC DISEASES? WHY DO SOME PEOPLE SUFFER FROM ALLERGIES? WHAT IS CANCER? MEDICINEFIND OUT MOREAnything that damages the body or how it works can be called…
If you say, “The cat's out of the bag” instead of “The secret is given away,” you're using an idiom. The meaning of an idiom is different from the actual meaning of the words used. “An apple a day…
Converting Between Moles, Molecules, and GramsChemistryThe MoleWhat's a Mole?Molar MassConverting Between Moles, Molecules, and GramsPercent Composition Once you know how to find molar mass, you…
(Encyclopedia) Hubble's law, in astronomy, statement that the distances between galaxies (see galaxy) or clusters of galaxies are continuously increasing and that therefore the universe is expanding…
SPIRAL GALAXY ESO 510-G13IRREGULAR GALAXYELLIPTICAL GALAXYBIOGRAPHY: EDWIN HUBBLE American, 1889–1953MILKY WAYFIND OUT MOREStars are not scattered evenly throughout the Universe. Instead, they…
You can't see them, but they're there. Points and lines on a map define not only where you are, but also when you're there. Navigators still rely on these imaginary lines to get where they are…
(Encyclopedia) MarinetteMarinettemârĭnĕtˈ [key], city (1990 pop. 11,843), seat of Marinette co., NE Wis., on Green Bay at the mouth of the Menominee River; inc. 1887. A port of entry, it is the…
(Encyclopedia) Aquila [Lat.,=the eagle], equatorial constellation located N of Sagittarius and Capricornus, lying partly in the Milky Way. It is sometimes depicted as an eagle. It contains the bright…
