National Geographic Explorer (Student Magazine)

Parents:

Build your vocabulary! We add new words for each issue.

> > The Great Quake
> > Yellowstone
> > Odd Couples
> > Vikings
> > Lemurs

> > Complete Archive

Katydid: Mark Moffett/Minden
Pictures

Roller coaster: Shutterstock

Sandstone: Jeremy Woodhouse/ Pixelchrome, Inc.

Cave painting: �
Owaki-Kulla/ Corbis

Bug Battles
Explore the cool tricks that help mantids and katydids stay alive.


	GRAVITY RULES Roller coasters can be a lot of fun. That's largely because of gravity. Gravity is the force that pulls you down a big hill. That is exciting. But too much gravity can be dangerous. It can hurt you. Learn how to stay safe on page 2 of our May 2006 issue. Explore More Roller Coaster DataBase Check out the fastest roller coasters in the world. Learner.org: Amusement Park Physics Learn how rides turn physics into fun. How Things Work Discover the science behind everyday objects.


	ROCK HOUND There are three main types of rock: igneous, sedimentary, and metamorphic. Each type forms in a different way. Rocks tell scientists about a place. They give clues to how an area looked long ago. Uncover rocks and the clues they hold on page 6 of our May 2006 issue. Explore More Mineralogy 4 Kids Learn about rocks, minerals, and crystals. NG Game: Rock Stars Are you a rock star? Play our game and find out. NG Quick Flick: Rock Cycle Discover how rocks form with Tim and his robot, Moby.


	ANCIENT ART People make art. We have done so for ages. It is part of being human. Ancient art is found all over the world. It comes in many forms�from cave paintings to stone statues. Explore ancient art on page 18 of our May 2006 issue. Explore More The Cave of Lascaux See the world's most famous cave paintings. PBS Nova: Secrets of Easter Island Come face-to-face with ancient, giant statues. Stone Pages See pictures of ancient art in England, Ireland, and France.