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titmouse

(Encyclopedia) titmouse, common name for members of the Paridae, a family of passerine birds, which includes the tits, titmice, and chickadees. They are small, active birds with short, pointed bills…

scale, in zoology

(Encyclopedia) scale, in zoology, an outgrowth, either bony or horny, of the skin of an animal. The major component of the scales of fishes is bone, and they are formed directly in the skin membrane…

How Do Computers Work?

Computer Basics To accomplish a task using a computer, you need a combination of hardware, software, and input. Hardware consists of devices, like the computer itself, the monitor, keyboard,…

monoclonal antibody

(Encyclopedia) monoclonal antibody, an antibody that is mass produced in the laboratory from a single clone and that recognizes only one antigen. Monoclonal antibodies are typically made by fusing a…

chevrotain

(Encyclopedia) chevrotainchevrotainshĕvˈrətānˌ [key], name for several species of small, ruminant mammals of Africa and SE Asia. Although they are also called mouse-deer, chevrotains are not closely…

dormouse

(Encyclopedia) dormouse, name for Old World nocturnal rodents of the family Gliridae. There are many dormouse species, classified in several genera. Many resemble small squirrels. Dormice sleep…

stem cells

(Encyclopedia) stem cells, unspecialized human or animal cells that can produce mature specialized body cells and at the same time replicate themselves. Embryonic stem cells are derived from a…

Hardcover

Here are the best-selling children's books of all time (through the end of 2000), with author and year of initial publication, compiled by Publishers Weekly. OP means the book is no longer in print…

DK Science: Brains & Intelligence

As smart as a cassowary?Brain to body weightDinosaur brain power relative to a crocodile’sHow intelligent were dinosaurs? It is difficult to know how smart dinosaurs were because their brains…