The Internet Encyclopedia of Science   entire Web this site HOME | ABOUT THE ENCYCLOPEDIA | CONTACT Alphabetical lists of entries 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 CATEGORY INDEX Other encyclopedias on this site: Encyclopedia of Renewable Energy and Sustainable Living Children's Encyclopedia of Astronomy