About the Author

Mahlon Hoagland, a noted molecular biologist and member of the National Academy of Sciences, is best known as discoverer of amino acid activating enzymes and codiscoverer of transfer RNA. A winner of the Franklin Medal, he is former Professor and Chairman, Department of Biochemistry, Dartmouth Medical School. He has written four books about science for the public. Bert Dodson has illustrated over sixty books. He is the author of Keys to Drawing, published in eight languages. An avid science scholar, he has played a key role in a program to educate the nation's judges about molecular biology. He recently designed the animations for a PBS series about microbiology, Intimate Strangers.