Students use maps and rulers to analyze the genetic data that Dr. Epps collected from the bighorn sheep.
Use Science Bulletins media to explore other examples of disrupted abiotic and biotic factors.
"Greenhouse effect" and "global warming" are becoming household phrases but how, exactly, are they linked? Explore the interconnections and consequences of climate change.
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.
For most of human history, recording a star meant describing it with words or drawing a picture. The 19th-century invention of photography changed that—only to be revolutionized by digital imaging.
All the color photos of astronomical phenomena that we see in magazines and books begin as three separate images—one red, one green, and one blue. Explore how CCD cameras and their color filters work.
A 2-D map is a great guide here on Earth—and virtually worthless for finding your way around in outer space. Take a 3-D look at mapping our solar system and universe.
When it comes to observing stars, our eyes have their limitations. Take a look at how astronomers combat these limits and accurately measure the distances between celestial bodies.
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.
We owe our lives to gravity. It holds the atmosphere to Earth and keeps us all from falling off into space. Not to mention that without gravity, the stars and planets—including Earth—wouldn't even exist!
Did you know that satellites and the Space Shuttle don't need engines to power their orbits? See how Earth's gravitational pull bends their forward motion and keeps them moving around the planet.
Antarctica's winter runs from mid-February through late August. If you decide to stay, you're there for the duration—all aircraft traffic is stopped. Learn how research crews prepare to go it alone.
At the poles, it's possible to study sea ice that's 3,000 years old. Find out what scientists learn by cutting up ice cores and seeing the ice crystals' many different textures and colors.
Why does cold air rush out of a freezer when you open the door? How does it then move through a room? Experiment to learn the answers—and gain insight into the blustery winds of Antarctica.
This slideshow provides background information on the bighorn sheep and their habitat and breeding habits.