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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…

DK History: Medieval Africa

HOW DID TRADERS CROSS THE SAHARA DESERT? WHICH AFRICAN GOODS WERE HIGHLY PRIZED? TIMBUKTUSWAHILIOBASFIND OUT MOREFrom around AD 750 to 1500, lands to the south of Africa’s Sahara Desert were home…

About the Articles of Confederation (1776)

Source: The U.S. Government Printing Office After winning its independence from Great Britain in the Revolutionary War, the new country situated on the eastern seaboard of North America needed to…

All About Oceans

by Beth Rowen Honolii Beach Park, Hawaii Source: AP Photo/Caleb Jones Related Links Profile of the World's…

Caution: Pool Area

Company Time  Tournament Tips Take a chance on a No. 12 seed. At least one No. 12 seed has upset a No. 5 seed in the first round of every tournament in the last ten years. Don't take a chance…

Anatomy and
Physiology: When You Gotta Go …

When You Gotta Go …Anatomy and PhysiologyThe Excretory SystemWaterworksWhere It All HappensReabsorptionWhen You Gotta Go … Okay, so you've made the urine. Now what? You can't keep it forever! So…