Artist Bob Miller's Light Walk at the Exploratorium will change the way you look at light, shadow, and images.

Note that as the distance of the planet from the sun is increased, the period, or time to make one orbit, will get longer. Kepler didn't know the reason for these laws, though he knew it had something ...

What Is a Solar Eclipse?

Do the activity with the whole class by projecting the Web pages and playing the videos. Introduce the activity to the entire class, then have students view the Web pages, play the videos, and ...

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 ...

The Institute for Inquiry at the Exploratorium empowers elementary teachers and leaders to bring science inquiry to life in K-5 education. Rooted in the museum's legacy of hands-on learning, IFI ...

Now we have great tools like spreadsheets to do the numerical computations for us. Below you can download OpenOffice (or Libre Office), Apple Numbers or Excel format files. In these spreadsheets, you ...

Measurement Equivalents From cups to grams to eggs, in cooking and in science, numbers need units to be measurements. Different countries use different volume and mass measurements, and converting ...

In Navajo (Diné) tradition, the eclipse marks a sacred time. Solar eclipses are compelling astronomical events that connect us to the Sun and the Moon in powerful ways. Annular or total solar eclipses ...

Change the atmosphere to change the water below. Create a carbon dioxide–rich atmosphere in a cup and watch how it changes the water beneath it. This model of ocean-atmosphere interaction shows how ...

It might seem obvious to say that earthquakes do most of their damage by shaking the ground. But groundshaking is actually a complex phenomenon. Engineering the seismic safety of a structure involves ...

Another popular system called a diagrammatic cipher, used by many children in school, substitutes symbols for letters instead of other letters. This system is, in essence, the same as the letter ...