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In a Nutshell: The Theory of Relativity

You’ve probably heard of the theory of relativity. And you may even know that motion, mass, energy, time and space are all relative. But if you’re confused about what any of that actually means, look…

Roundup of Recent Science Discoveries, 1999

Ancestor of Mammals Discovered The fossil skull of a 260-million-year-old sheep-sized animal was found near Williston on the Northern Cape, South Africa. It is the most primitive member yet…

DK Society & Beliefs: Local Religions

WHY ARE SOME PLACES SACRED? WHO WORSHIPS ANCESTORS? WHAT IS A FETISH FOR? RITUALSFIND OUT MORELocal religions are unique to tribal or cultural groups living apart from modern societies. They are…

Writing Book Reports

Homework Center – Writing Skills Book reports are a way to show how well you understood a book and to tell what you think about it. Many teachers have their own rules about what a…

Henry Adams BULLARD, Congress, LA (1788-1851)

BULLARD, Henry Adams, a Representative from Louisiana; born in Pepperell, Mass., September 9, 1788; was graduated from Harvard University in 1807; studied law in Boston and Philadelphia; was…

DK Science: Communication

HOWLING WOLVESFEARSUBMISSIONEXCITEMENTBIG FIN REEF SQUIDBOTTLE-NOSED DOLPHINSSCENTED MESSAGEBIOGRAPHY: JANE GOODALL British, 1934-LANGUAGEFIND OUT MORESounds, signals, and gestures make up an…

Intermediate-Level Science Projects: Chemistry

ChemistryIntermediate-Level Science ProjectsChemistryCan You Be a Human Battery?What Materials Make the Best Crystals? Are All Pennies Created Equal? The penny, which has been around…

Intermediate-Level Science Projects: Chemistry

ChemistryIntermediate-Level Science ProjectsChemistryCan You Be a Human Battery?What Materials Make the Best Crystals? Are All Pennies Created Equal? The penny, which has been around in the…

Exercise Trends

A Healthy New Year From yoga to Tae-Bo, new exercises for the resolution-minded by Mike Morrison [ Take the Health Trends Quiz ] ODDS ARE YOU'RE ONE of the millions of people whose New Year…