See the invisible made visible using tools from simple hand lenses to powerful microscopes ...

The Big Bang theory raises some important questions about the fundamental nature of the universe: Will the expansion of the universe, set in action by the Big Bang, continue forever? Or will gravity ...

How a gathering at San Francisco’s Exploratorium became a national holiday ...

Make three Roto-Copters for each person. Use a marker to draw a 1-foot circle on a piece of newspaper. Put a cereal bowl in the middle of the circle. The circle is the target area and the bowl is the ...

After 10 minutes, take a look at the nails. Are they a different color than they were before? Is the leaning nail 2 different colors? If not, leave the nails in the bowl and check on them again in an ...

Completely fill two bottles with hot water. Keep filling until a meniscus (an upward bulge) forms on the surface of the water. Completely fill two bottles with cold water. Keep filling until a ...

Light Painting is a great way to create striking images and illusions using a camera, a light source, and a little practice. When the camera shutter is open (and the room is dark) the film or digital ...

SAN FRANCISCO (March 10, 2026) –The Exploratorium has appointed Laura Zander as its first Chief Growth & Operating Officer. After 18 years in C-suite leadership at the Exploratorium, including serving ...

Sunday (Daytime Members/Donors Only 10:00 am to Noon): 12:00 pm—5:00 pm ...

Sunday (Daytime Members/Donors Only 10:00 am to Noon): 12:00 pm—5:00 pm ...

Screaming headlines abound in our media-saturated world. “Killer Moths Invade Homes.” “New Drug Promises Alzheimer’s Cure.” “Experts Confirm: Sky Is Falling.” Some are obvious click bait, but others ...

Can you smell time? Your dog can. On a very basic level, so can you: When you crack the lid on that old quart of milk, tentatively sniff and—peeyouu!—promptly dump that foul stuff down the sink, you ...