Explore the method scientists use to determine evolutionary relationships by creating a coin cladogram. Then try your hand at classifying a handful of dinosaurs.

While refracting and reflecting telescopes use different means of collecting light, the same principle applies to both—the bigger the aperture, the more light collected.

What could Galileo see when he looked through his telescope? Build a refracting telescope with lenses similar to the ones he used, and see the answer for yourself.

What is a telescope's focal point, and why is knowing its location so important to astronomers? Grab a flashlight, an empty soda bottle, and a few other supplies; then find out.

No doubt you've received—or even sent—a digital image. But do you know how these pixel-based photographs work? You will after you decode one yourself.

A picture is worth a thousand words, but whose words are they? Zoom in on how the opinions and biases of photographers can color the images they take.

What defines you: your ethnic background, the region you live in, your age, or your gender? Correct answer: All of the above. Assemble the pieces of your identity in a cultural chest. 

When people move, they take along more than their personal possessions. They also transport their culture. How have your family and your neighbors influenced the community you live in?

One of the best ways to learn about a culture is to look at the objects its people use. What can you tell from the object alone? And what do you gain by seeing it in use?

When you think of your family's traditions and beliefs, what special objects come to mind? Would the meaning and value of these objects be clear to someone from another family or culture?