The biological process by which skin and other body tissues repair themselves after injury....
A specialized UN agency responsible for international public health....
Art music traditions rooted in Western Europe dating from the Medieval period....
The study of oscillations and propagation of energy through matter and space....
American molecular biologist who co-discovered the double helix structure of DNA....
An information system enabling documents to be connected via hyperlinks on the Internet....
A global conflict from 1939 to 1945 involving most of the world's nations....
The first President of the United States and a Founding Father of the nation....
Efforts to protect species and their habitats from extinction....
The continuous movement of water through Earth's systems: evaporation, condensation, and precipitation....