Accurate, approachable, and indispensable, this illustrated science encyclopedia is arranged in such categories as "Planet Earth", "Living Things", "Chemistry a

Presents articles on scientific and technological topics arranged in alphabetical order.

Presents facts on more than 1300 subjects from Aardvark to Zoo.

"Minutes, months, millennia - how long is a life on earth?"

Introduces important scientific principles and provides basic definitions of common terms in standard alphabetical arrangement with references to related entrie