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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…

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…

Fathers by the Numbers

Facts about dads from the U.S. Census Bureau Source: U.S. Census Bureau Related Links Father's Day Timeline Father's Day…

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: 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…

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…

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…