Alexander amasses the world's largest business card collection and makes it into The Astounding Book of World Feats...but then doesn't know how to get rid of the million-plus...

Scientists visit the oceans of the world to study what is beneath the sea floor.

Starlings imitate the sounds they most often hear. They use their talent for mimicry to attract mates and defend their nests.

Article tells about how silk is made in Hotan, China. There, women make silk by hand, as their ancestors have for centuries.

Chloe shows the proper care of a horse before and after a ride.

Information about Saturn's rings and a theory about how they formed.

U.S. President Harry Truman loses, and finds, his eyeglasses

These dogs train to rescue people from avalanches.

This traveler shares what he learned about life in the Andes.

Scientists used sonar and other experiments to discover how humpback whales work together in teams to catch fish to eat. They learned why whales blow bubbles make trumpet-like...