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Clostridium

(Encyclopedia) Clostridium, genus of gram-positive bacteria (see Gram's stain), several species of which cause significant, potentially deadly diseases in humans as a result of the toxins that each…

wire

(Encyclopedia) wire, metal filament, strand, or solid rod usually having a round cross section. Metals and alloys used for wiremaking are chosen for high tensile strength and ductility or for their…

Selected Biographies: S

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z More Biographies Don't see the biography you're looking for? Search 30,000+ biographies Biographies…

DK Science: Reconstructing The Past

Assembling the skeletonJoining the neckWelding the frameworkCompleted displayReconstructing a dinosaur skeleton is a complex job as usually only a fraction of the skeleton is recovered.…

DK Science: Fish

FILTER FEEDERAFRICAN LUNGFISHJAWLESS LAMPREYFISHFIND OUT MOREFish are water animals that evolved about 500 million years ago. They were the first animals to have an internal skeleton. Most fish…

vision

(Encyclopedia) CE5 Optic nerve vision, physiological sense of sight by which the form, color, size, movements, and distance of objects are perceived. Defects of vision include astigmatism,…

Notable Tennis Players

René Lacoste See also People in the News Recent Obituaries Related Links Wimbledon Fun Facts Davis Cup Championships Federation Cup Championships U.S. National and Open Champions…

Skyscraper Facts

From the father of the skyscraper to a building with a view by Karen Barss The Eiffel Tower, in Paris, France Related Links Skyscraper HistoryTallest Building TimelineWorld's…

Rules That Needed to be Broken

"Open" for Business — Tennis (1968) Cause: Tennis was split between two parties - amateurs and professionals - and each had what the other wanted. The amateurs were playing in the…