How kittens grow

By Millicent E. Selsam

Como Crecen Los Gatitos Mariposa

By Millicent E. Selsam

Extranos animales del pasado

By

Questions and Answers About Horses

By Millicent E. Selsam

First Look at Animals With Backbones and A First Look at Animals Without Backbones

By Joyce Hunt, Millicent E. Selsam

There are more than a million different kinds of animals in the world. Only 50,000 of these have backbones, and are called vertebrates. The rest are animals without backbones, called invertebrates....

A First Look at Dinosaurs

By Joyce Hunt

How to Be a Nature Detective

By Millicent E. Selsam

Birth of a forest

By Millicent E. Selsam

Cotton

By Millicent E. Selsam

Surveys the history, growth cycle, processing, and varied uses of one of the world's most important fiber plants.

Catnip

By Millicent E. Selsam

Text and photographs describe the physical structure, uses, effects, cultivation, and history of catnip.