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DK Science: Telecommunications

MAKING A TELEPHONE CALLOPTICAL FIBRESFIND OUT MORETelecommunications began more than 160 years ago, with telegraphs and telephones working through wires. We still use wires – known as landlines…

Our Solar System (in order from the Sun)

by Mark Hughes Our solar system consists of a bright yellow star, eight planets, nearly 150 moons, and thousands of smaller objects like asteroids and comets. If you wanted to see all eight planets…

DK Earth: Oceans

OCEAN LIFE SUNLIT ZONE TWILIGHT ZONE DEEP-SEA ZONE WHY IS THE SEA SALTY? WHAT CAUSES THE OCEAN CURRENTS? OCEAN FLOORWAVESFIND OUT MOREEarth’s five oceans (the Pacific, Atlantic, Indian, Southern…

DK Earth: Planet Earth

HOW WAS EARTH FORMED? IS EARTH THE SAME ALL THE WAY THROUGH? HOW DOES EARTH SUPPORT LIFE? HOW DOES EARTH MOVE THROUGH SPACE? SEASONSFIND OUT MOREPlanet Earth is a dense, rocky ball about 7,920…

DK History: World War II

HOW DID THE WAR BEGIN? WHY WAS THIS A WORLD WAR? WAR IN THE PACIFIC WHEN DID THE TIDE TURN? BLITZKRIEGHOLOCAUSTATOM BOMBFIND OUT MOREIn 1939, Nazi Germany invaded its neighboring countries,…

Roadside Attractions in America

Going on a road trip? The St. Louis Arch, Statue of Liberty and Golden Gate Bridge are great tourist sites. But if you prefer offbeat destinations, check out these roadside attractions and odd…