You've all seen the Mole Box, an 11 inch cube which shows 22.4l (one mole) of air. Our specimen set shows the same concept in solid form. Our set includes one mole (6.03 x 1023 particles) of aluminum, copper, iron, and zinc. Includes instructions.
Color science has always been difficult...
A Walk through the Heavens: A Guide to Stars and Constellations and their...