Best known as the longtime writer of the Mathematical Games column for "Scientific American," Gardner displays an awesome level of erudition combined with a wic

Tadpole loves his rainbow friend, the caterpillar, and she tells him she loves everything about him. "Promise that you will never change," she says. But as the

Leo Lionni’s spirited story about a minnow and a tadpole is now available as a Step 3 Step into Reading book—perfect for children who are ready to read on t

Wendy Pfeffer describes the amazing metamorphosis from tiny, jellylike egg, to little fishy tadpole, to great big bullfrog. Holly Keller has created the archety

The paleontologist and professor of anatomy who co-discovered Tiktaalik, the “fish with hands,” tells a “compelling scientific adventure story that will c