Oceanographers, astronomers, mathematicians, biologists, geologists, psychologists--even dermatologists!--and experts in other, sometimes quite arcane fields contributed to this collection of lucid answers to puzzling questions. The questions were asked by lay readers of Scientific American; the responses address the reasons that snowflakes grow symmetrically, the color of the ocean, the true strength of a spider's silken dragline, carsickness, tooth decay, whisker specialization, jellyfish sex, and tons of others. Fast, fun, fascinating.

With questions on one side and answers on the other, these 48 fact-filled Knowledge Cards are a great source of condensed information—all in a deck the size of a pack of playing cards! Perfect for students, teachers, and the purely inquisitive, this deck is sure to spark your curiosity and encourage you to delve deeper into this fascinating subject.

ISBN: 0-7649-2968-2; size: 3 1/4 x 4".

Box Size: 4.00in (10.16cm) x 3.25in (8.26cm) x 0.75in (1.91cm)

Recommended for ages 10 and older.

Weight: 0 lb 5 oz ( 0.14 kg )