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DK Science: Era Of The Dinosaurs

Geological timescaleTriassic period: 250–200 million years agoJurassic period: 200–145 million years agoCretaceous period: 145–65 million years agoDinosaurs roamed the planet for about 165 million…

DK Science: Planet Earth

ATMOSPHEREOCEANSLANDICE AND SNOWEARTH SCIENCESTUDY TECHNIQUESBIOSPHEREAXISFIND OUT MOREThe rocky ball that forms our world is one of nine planets in the Solar System. Earth is a sphere, with a…

DK Nature: Insects

WHY ARE INSECTS SO SUCCESSFUL? HOW DO INSECTS DEFEND THEMSELVES? WHAT DO INSECTS EAT? WHERE DO INSECTS GO IN WINTER? HOW DO INSECTS AFFECT HUMANS? INSECT CLASSIFICATIONANTENNAECOLONIESFIND OUT…

Emmett Chappelle Biography

inventorBorn: 1925 Through his discovery that a specific combination of chemicals caused living organisms to emit light, Chappelle facilitated important findings…

Elephant Lifespan

The Question: How old do elephants actually get? The Answer: Elephants usually live 60 to 70 years. See our encyclopedia entry on elephants…

Sikhism

A major religion of India and the fifth-largest faith in the world, Sikhism emerged in the Punjab under the guidance of the guru Nanak (1469–1539?). This region had been influenced by the Hindu…

Kids from Brazil

Continent: Northeastern South AmericaClimate: Tropical and subtropical; some areas have an annual rainfall of more than 6 feetSchool: The school year runs from February through December. Kids…

Kids from Egypt

Continent: North Africa/Middle EastClimate: Hot desert! In summer, temperatures average more than 100 degrees.School: School attendance is required for six years, generally beginning at age six or…

Classifying Animals

The inventor of modern scientific classification was Carolus Linnaeus (1707-1778) a Swedish botanist who classified and described more than 4,400 species of animals and 7,700 species of plants…