In outer space, you might not recognize the Big Dipper. The stars that form this constellation exist in 3-D not 2-D—so the star pattern changes with your viewpoint. Take another look at the Big Dipper.
How long have humans been on Earth compared to the length of time dinosaurs roamed the planet? Gain a new understanding of time by mapping out Earth's history.
Explore your ancestral past and the 22nd-century possibilities of DNA research with this collection of kid-friendly titles selected for the Hall of Human Origins.
Here on Earth, we tend to take gravity for granted. Yet the astronauts aboard the Space Station need to learn how to do everything without it. Can you imagine shooting hoops in a "weightless" world?
Students in grades 3-8 can observe and learn about the carbon cycle in this experiment.
"Atmosphere," "biofuels," "carbon dioxide"—challenge students to spell out their climate change knowledge from A to Z.
Want to see firsthand how a dinosaur moved? Observe a bird as it walks along the sidewalk or in your backyard. Then challenge a friend to a "push-up" race—dinosaur versus crocodile.
Ever wish you could watch a dinosaur in action? Investigate modern birds for an insightful look at how ancient dinosaurs moved and behaved.
Travel to Liaoning, China, where a fossilized lakebed is providing scientists with the most complete picture to-date of what a dinosaur ecosystem probably looked like.
We know that some dinosaurs had fancy frills while others had sharp horns or pointy spikes. But why? Investigate the purpose of these and other dinosaur "fashions."