The true story of eighteenth-century mathematician Sophie Germain, who solv...More

Mammoths and mastodons roamed the earth for more than a million years, and ...More

Once upon a time, seven tiny duck beaks pecked their way out of their eggs,...More

Gregor Mendel explains to children the theory of heredity in simple-to-unde...More

Simple science text and dramatic illustrations give a close-up view of the ...More