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Nuclear and Chemical Accidents

Though nuclear power is a good source of energy and is generally not a threat, there have been instances when security measures have failed. Nuclear…

Illinois, state, United States

(Encyclopedia) CE5 Illinois, midwestern state in the N central United States. It is bordered by Lake Michigan and Indiana (E); Kentucky, across the Ohio River (SE); Missouri and Iowa, across the…

lightning

(Encyclopedia) lightning, electrical discharge accompanied by thunder, commonly occurring during a thunderstorm. The discharge may take place between one part of a cloud and another part (intracloud…

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.…

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…

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…

Television Hall of Fame

Each year, the Academy of Television Arts and Sciences inducts up to seven people or programs to the Television Hall of Fame. Here are the past…

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 best…