Glass is used to make beautiful paperweights

The author follows a llama salt caravan across the Andes Mountains. He describes his companions two Quechua Indians and their way of life.

Is it possible to see "friction" under a microscope?

The Hawaiian cleaner wrasse gets its food by cleaning other fish.

The author's experience of an elephant seal molting in her backyard.

Why can harbor seals outswim humans?

Meet a scientist who dodged elephants and a cheetah to study baboons.

Learn why people food makes a dangerous diet for bears.

A scientist discovered that monkeys can control the sounds they make--they seem to know when to keep quiet and when to call in the family.

Eleven-year-old Jennifer gets into quicksand.