Jane Goodall

Robert Goddard

Louis Pasteur

Rachel Carson

James Watt

Charles Darwin

Dynamite

Marie Curie

Lise Meitner

Jonas Salk

Daguerre

Steven Hawking

Alchemy

Katherine Burr Blodgett

X-Rays

Black Holes

Chewing Gum

Thomas Edison

Mae Jemison

Victor  F. Hess

The Moon

Maria Mitchell

Apple II

Mad Cow Disease

Time Travel

Internal Combustion Engine

Eli Whitney

Finger Printing

George Washington

Norman Borlaug

Rosalyn Yalow