What do snowflakes look like on Mars?
In an earthquake, some older structures collapse and others stand tall. The difference is usually retrofitting.
Richter and beyond
Meet a kinetic sculptor.
What's the quietest sound you can find – and how can you find it? Download listening tips.
View the night sky from any latitude on earth, and take a guided tour of the Hawaiian star families.
Make cool boxes out of old (or new) greeting cards and postcards.
To understand how skaters turn in midair, try this little experiment.
Play with the stuff that makes dough stretchy.
Pier 15 (Embarcadero at Green Street)San Francisco, CA 94111(415) 528-4444
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