Classroom Activity

# Calculate Horsepower

Most car enthusiasts can tell you the horsepower of their favorite vehicle. But what does that measurement really mean? And what does it have to do with horses? Find out with this mathematical challenge.

Classroom Activity

# It's Aliiive--Or Is It?

Scientists have found life everywhere they've looked on Earth—even at the bottom of the ocean, where conditions are extreme. Investigate one deep sea vent's thriving ecosystem.

# Is it Alive?

Despite extreme temperatures and the absence of sunlight, you can find a variety of life on the ocean floor. Take a look at the amazing organisms that thrive in this unlikely environment.

Classroom Activity

# Underwater Plume

With the help of three friends, you can create your own mini underwater geyser. All you'll need is a soda bottle, a baby food jar, aluminum foil, food coloring, and a few more household supplies.

Online Resource, Article

# Profile: Georges Lemaître, Father of the Big Bang

When a Catholic priest—cosmologist first proposed that the universe began as a "primeval atom," it seemed preposterous. Yet, within a few years, his theory had helped revolutionize cosmology.

Article

# Scaly Surprises (Science World)

Did you know that a snake's skin includes see-through scales that cover its eyes. Or that chameleons have sticky tongues to pull in their prey? Examine squamates and their remarkable adaptations.

Article

# Darwin: Voyage of Discovery (Science World)

Did you know that Darwin was prone to sea sickness? Or that he found a bird specimen he was seeking ... on his dinner plate? Examine the big insights and amusing details of Darwin's historic voyage on the HMS Beagle.

Article

# Bats: Twilight Zone (Science World)

Did you know that there are more than 1,100 different bat species? Or that scientists have not yet figured out how all these species are related? Explore the challenges of studying these night fliers.

Article

# Bug Hunter (Science World)

Did you know that while all bugs are insects, not all insects are bugs? Learn more about "true bugs," whose characteristics include defensive glands that produce and release foul smells.

Article

# Crash Course? (Science World)

Could a space rock destroy life on Earth? Learn more about asteroids, comets, and other space objects and what happens when they collide—with each other and with our planet.