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DK Science: Floating

FLOATING AIRSHIPFLOATING SHIPBIOGRAPHY: ARCHIMEDES Greek, 287-212 BCSINKINGFIND OUT MOREWhen an object such as a boat or an airship rests in a fluid (a liquid or gas), it has to displace (push…

Sports Superstitions

We all hear popular superstitions when the 13th day of the month falls on a Friday. And no player wants to wear the number 13. It is said that superstitions have been…

Classical Mythology: A Family Reunion

A Family ReunionClassical MythologyThe Model Hero: PerseusA Face Only a Mother Could LoveHomeward BoundA Family Reunion Upon his return to the island of Seriphus, Perseus found his mother taking…

The Supreme Court: Killing Gun Control

Killing Gun ControlThe Supreme CourtSeparating Government PowersWho's in Control—the States or the Federal Government?Killing Gun ControlSupporting Family LeaveAccepting Homosexuality…

Government Trivia

Members of Congress don't need postage stamps for their official mail—they just need a frank. No, not a hot dog! It's their signature on the outside of envelopes that hold letters mailed to…

Famous Words About Books

What do books mean to you? People often have a lot to say about books. They talk about what they like and don't like as well as how books have influenced their lives. Do you agree with any of the…

Floods

A flood occurs when a body of water rises and overflows onto normally dry land. Floods occur most commonly when water from heavy rainfall, from melting ice and snow, or from a combination of these…

Measuring Body Mass

Many people are not sure how much weight they should lose. Weight loss of only 5–10 percent of body weight may improve many of the problems associated with…

Kids at Work

When you help with household chores after school, you may dust or wash dishes. If you grew up 100 years ago, you may not have gone to school at all. You may have worked full time as a powder…