Aristotle

Aristotle at Mr. Dowling.com

Ptolemy

Ptolemy at Enchanted Learning

Space.about.com

Wolfram Science

Ptolemy: Lots of Text

The Earth's Movement

How fast does the Earth move?

Galileo

Galileo at Enchanted Learning

I'm a Hero

Galileo at Mr. Dowling.com

Galileo's Experiments

Galileo at Discovery Education

Simple Machines

About.Com on Galileo

Einstein

Einstein at Enchanted Learning

Einstein at Discovery Education

Einstein: Photoessay

Einstein

Copernicus

Copernicus at Enchanted Learning

Copernicus at Mr. Dowling

Copernicus at Discovery Education

Wolfram Science

Copernicus: Encarta

Leonardo Da Vinci

Da Vinci at Museum of Science

Sir Isaac Newton

Newton at Enchanted Learning

Newton at Mr. Dowling.com

Think Quest on Newton

Lucid Cafe