WHAT IS AN ELECTRIC CURRENT? WHEN DOES CURRENT FLOW IN A CIRCUIT? WHAT MAKES CURRENT FLOW IN A CIRCUIT? BATTERYCOMPONENTSFIND OUT MOREAn electric current flows in a loop, powering bulbs or…
Sympathetic: Yikes!Anatomy and PhysiologyThe Central and Peripheral Nervous SystemsYou've Got Some Nerve!Gyri and SulciThe Control CenterSensory and Motor ControlThalamus: The Switching…
Classic Ballets Because many ballets take their stories from folklore, they can feel like fairy tales told through dance. Here are some favorites. The date the ballet was first performed is in…
(Encyclopedia) Tauber, RichardTauber, Richardtouˈbər [key], 1891–1948, Austrian tenor. He made his debut (1913) in Chemnitz, Germany, as Tamino in Mozart's Magic Flute. Later he sang in opera and…
(Encyclopedia) scar, fibrous connective tissue that forms at the site of injury or disease in any tissue of the body. Scar tissue may replace injured skin and underlying muscle, damaged heart muscle…
(Encyclopedia) Barclay de Tolly, Mikhail, PrinceBarclay de Tolly, Mikhail, Princemēkhəyēlˈ, bərklīˈ də tôˈlyē [key], 1761–1818, Russian field marshal, of Scottish descent. He gained prominence in the…
(Encyclopedia) cough, sudden, forceful expiration of air from the lungs caused by an involuntary contraction of the muscles controlling the process of breathing. The cough is a response to some…
(Encyclopedia) coltsfoot, Eurasian perennial herb (Tussilago farfara) of the family Asteraceae (aster family), now a widespread weed in most northern lands. The scaly flower stalk bears a yellow…
(Encyclopedia) Menen, Aubrey ClarenceMenen, Aubrey Clarencemĕnˈən [key], 1912–89, English novelist, b. London. The son of an Indian father and an Irish mother, he was a drama critic, theater director…
