exploratorium
Showing 181 to 210 of 9327 results found.
Seasons and Shadows
Activity
Seasons and Shadows

Why is your shadow longer in winter than in summer? Grab a basketball and some paperclips and find out!

Make Your Own Petroglyph
Activity
Make Your Own Petroglyph

Try your hand at explaining symbols both modern and ancient, and then make your own.

Modeling the Seasons
Activity
Modeling the Seasons

See for yourself how the tilt of the earth's axis results in what we experience as the seasons.

Knowing North
Activity
Knowing North

Stand outside on a sunny day with a watch in your hand, and you can tell which way is north.

Whirling Watcher
Activity
Whirling Watcher

Make a spinning disc called a stroboscope, which lets you create your own animated cartoon.

Water Bottle Membranophone
Activity
Water Bottle Membranophone

Staff member Vivian Altmann presents the "Snack" Water-Bottle Membranophone." Make some noise with simple materials.

Solar Images
Activity
Solar Images

The more astronomy changes, the more it stays the same. This series of images juxtaposes ancient and modern study of the celestial bodies.

Any Little Patch of Dirt
Video
Any Little Patch of Dirt

A trash-filled median blossoms into a community oasis.

Three Ways to Make a New Plant
Activity
Three Ways to Make a New Plant

Learn how grafting, hybridizing, and transgenics have transformed cultivation.

Tuning
Activity
Tuning

Find out what all that fiddling around before a concert is really about.

Stepping
Activity
Stepping

Stepping is rhythmic movement that uses the body as an instrument.

Peter Whitehead
Activity
Peter Whitehead

Peter Whitehead is an instrument builder, performer, and composer.

Sad Music
Activity
Sad Music

Our reactions may be trained, but the devices that make music sound "sad" are real enough.

Recorded Voice
Activity
Recorded Voice

Most people abhor the sound of their own recorded voice. So what are these recording devices doing to our voices to make them sound so awful?

Neighbor's Stereo Blues
Activity
Neighbor's Stereo Blues

Why do I hear the bass from my neighbor's stereo, but not the treble?

Earworms
Article
Earworms

Why do some songs get stuck in your head?

Opera singers
Activity
Opera singers

Opera singers carry notes that seem to last forever. How do they do it?

Everybody Gets Lunch
Activity
Everybody Gets Lunch

Sit down for compost tea with a visionary cultivator.

Peter's Savage Garden
Activity
Peter's Savage Garden

Explore the deadly beautiful world of carnivorous plants.

Why Save Seeds?
Activity
Why Save Seeds?

Find out why biodiversity benefits plants and people alike.

Hello Dahlia
Activity
Hello Dahlia

See why these beautiful flowers have attracted generations of admirers.

The Secret Lives of Flowers
Activity
The Secret Lives of Flowers

Take a peek at the colorful world of plant sex.

Garden Variety
Activity
Garden Variety

Discover the uncommon stories behind the most common fruits and vegetables.

Garden Lore
Activity
Garden Lore

The fact and fiction behind some bizarre gardening remedies.

Truckload of Pumpkins
Activity
Truckload of Pumpkins

Meet the competitors and their humongous pumpkins at Half Moon Bay's Great Pumpkin Festival.

Subzero Gardening
Activity
Subzero Gardening

Tour a hydroponic greenhouse in frozen Antarctica.

Can You Believe It? (download)
Activity
Can You Believe It? (download)

Use this desktop widget to view current science news feeds on your computer.

Why are bubbles round?
Activity
Why are bubbles round?

Bubbles are round when they float free through air. But what happens when you pack bubbles together?

Singing in the Shower
Activity
Singing in the Shower

Capture the sound of your beautiful voice by singing into a wok.

Flat Lens
Activity
Flat Lens

A drop of water makes a fine magnifying lens.

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