Albert Einstein

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Albert Einstein  (1879-1955), German-born American physicist and Nobel laureate, best known as the creator of the special and general the...Read More

Amino Acid

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Amino Acids , important class of organic compounds that contain both the amino ( 8 NH 2 ) and carboxyl ( 8 COOH) groups. Of these acid...Read More

Monkey

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Monkey (animal) , any of about 160 species of primates that have grasping hands, forward-facing eyes, and highly developed brains. M...Read More

Dog

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Dogs Dog , mammal generally considered to be the first domesticated animal. This trusted work partner and beloved pet learned to li...Read More

Snake

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Snake (reptile) , legless animal with a long, flexible body covered with overlapping scales. Snakes are reptiles , a diverse group of ...Read More

Dinosaur

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Dinosaur Dinosaur , one of a group of extinct reptiles that lived from about 230 million to about 65 million years ago. The word din...Read More