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Miami Dolphins: The Path to Perfection

Path to Perfection by Michael Morrison In 1972, the Miami Dolphins completed what no other NFL team had — a perfect season. The Dolphins won all 14 of their regular season games, then…

DK Science: Endocrine System

ENDOCRINE GLANDS OVARIES TESTES HORMONE FACTORY FIND OUT MORE Many body processes are influenced by hormones, chemical messengers produced by glands of the endocrine system. These glands…

DK Science: Molluscs

PHYLUM: MOLLUSCASlugs, snails, oysters, clams, squid, octopuses, and cuttlefish are very different to look at, but they are all molluscs. They have a ribbon-like tongue, called the radula,…

DK Science: Sediments

DEPOSITIONFIND OUT MOREThe rocky material that is transported and DEPOSITED by rivers, seas, glaciers, and the wind is called sediment. Clay, sand, and gravel are all types of sediment.…

Famous Star Gazers

Eratosthenes 276–195 B.C. This Greek astronomer was the first to measure the size of Earth accurately. He determined that the earth's polar diameter was about 7,850 miles. (In fact, the distance is…

The Flap Over Pluto

Sources: NASA and the International Astronomical Union. News Flash (August 24, 2006)—Pluto Demoted! Read About It Here. Misleading reports that Pluto was about to lose its status as a planet in…

The Chemistry of Biology: Atomic Theory

Atomic TheoryThe Chemistry of BiologyIntroductionAtomic TheoryChemical Reactions: Ionic, Covalent, and Polar Covalent BondsWaterOrganic ChemistryCarbohydratesLipidsProteinsNucleic AcidsVitamins and…