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DK Nature: Communication

WHEN DO ANIMALS USE VISUAL SIGNALS? WHY DO ANIMALS COMMUNICATE WITH SOUND? DO ANIMALS ALWAYS TELL THE TRUTH? WHY DO ANIMALS USE PHEROMONES? FIND OUT MOREAnimals communicate with their own kind…

DK Science & Technology: Measurements

WHAT IS A MEASUREMENT SCALE? WHO MADE THE FIRST MEASUREMENTS? HOW ARE MEASUREMENT UNITS FIXED? FIND OUT MOREHow big is an ant? How high is a mountain? An observation of a property (characteristic)…

Ten Tips for Better Spelling

This may be the best-known spelling rule: i before e, except after c or when sounded like "ay" as in neighbor and weigh Here are some words that follow the rule: IE words: believe, field…

Geometry: Isometries

IsometriesGeometryTransformationsIsometriesDilationsSymmetry The word isometry is used to describe the process of moving a geometric object from one place to another without changing its size or…

Presidential Quotes

Words from each American president Compiled by David Johnson Note: Dates indicate term of office. Choose a president: George Washington John Adams Thomas Jefferson James Madison James…

Gournay, Vincent de

(Encyclopedia) Gournay, Vincent deGournay, Vincent devăNsäNˈ də g&oomacr;rnāˈ [key], 1712–59, French economist, precursor of the physiocrats and of Adam Smith. A wealthy merchant, he was in…

McIntire, Samuel

(Encyclopedia) McIntire, SamuelMcIntire, Samuelmăkˈəntīrˌ [key], 1757–1811, American architect and woodcarver, b. Salem, Mass. He developed high skill as a joiner and housewright and in wood…

Wyatt, James

(Encyclopedia) Wyatt, James, 1746–1813, English architect. He worked in many styles but is best known as one of the originators of the Gothic revival. Appointed surveyor at Westminster Abbey in 1776…

Schmidt, Brian Paul

(Encyclopedia) Schmidt, Brian Paul, 1967–, Australian-American astrophysicist, b. Missoula, Mont., Ph.D. Harvard, 1993. He has been associated with Australian National Univ. since 1995. Schmidt and…