Natural selection plays a large role in the evolution of a species. The following activity demonstrates this concept.
Can you walk like a dinosaur? Hint: The movement is not like lizards, crocodiles, and other reptiles; instead, it's more like birds. Investigate what else birds and dinosaurs have in common.
What should you think about before selecting a site to study? The answer depends on what you want to know. Get tips from working scientists about how to hone in on the perfect site for you.
When it comes to identifying plant species, making mistakes is part of the process. That's why this botanist and curator recommends, "Never erase anything!"
Re-create the 130-million-year-old forest in what is now China to understand why this fossil site is of such vast scientific importance.
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.