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Michel, Hartmut

(Encyclopedia) Michel, HartmutMichel, Hartmutmĭkhˈəl [key], 1948–, German biochemist, Ph.D. Univ. of Würzburg, 1977. Michel was the first person to reduce a photosynthetic action center, which is a…

Prelog, Vladimir

(Encyclopedia) Prelog, VladimirPrelog, Vladimirvlädyēˈmĭr prāˈlôg [key], 1906–98, Swiss chemist, b. Sarejevo, Austria-Hungary (now in Bosnia and Herzegovina). Educated in Prague, he worked in…

DK Science & Technology: Light

WHAT IS LIGHT? HOW DOES LIGHT TRAVEL? WHAT ARE SHADOWS? WHAT MAKES SOME MATERIALS OPAQUE? REFLECTIONREFRACTIONLASERFIND OUT MORELight is a type of energy known as electromagnetic radiation. It is…

Spring Training 1998

For the first time in Major League Baseball history 30 franchises have migrated south to Florida and Arizona to participate in spring training. That's because two new teams, the Tampa Bay…

DK Science: Black Holes

SUPERMASSIVE BLACK HOLESSPAGHETTIFICATIONFIND OUT MOREWhen the biggest stars explode as supernovas, their cores collapse in on themselves under gravity to become black holes. These regions…

Bowling Trivia

Restaurateur Joe Thum created America's first bowling organization on Sept. 9, 1895, when he pulled together representatives of various regional bowling clubs and formed the American Bowling…

Thomas Hearns

Born: Oct. 18, 1958Boxer has held world titles as welterweight, junior middleweight, middleweight and light heavyweight; four career losses have come against Ray Leonard, Marvin Hagler and twice to…

Tuberculosis: Tuberculosis: Airborne Nightmare

Tuberculosis: Airborne NightmareTuberculosisIntroductionTuberculosis: Airborne NightmareTreating TBTB Is a Global Peril TB-causing bacteria is passed from person to person through the air when…

Tuberculosis: Tuberculosis: Airborne Nightmare

Tuberculosis: Airborne NightmareTuberculosisIntroductionTuberculosis: Airborne NightmareTreating TBTB Is a Global Peril TB-causing bacteria is passed from person to person through the air when…