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.
More than 35 million years ago, horses thrived in wet forests. Take a close look at horse fossils to see what paleontologists can learn from studying an extinct animal’s bones and teeth.
Article, Hands-on Activity
Introduce younger students to squamates and some of scaly lizards and snakes that are part of this group of animals. Then put their exhibit-designing skills to the test.
Introduce younger students to Darwin's voyage on the HMS Beagle with this interview Niles Eldredge. Then challenge their ability to spot environmental adaptations with the Iguana Puzzler.
Introduce younger students to bats, which make up nearly one-fifth of all mammal species on Earth. Then put their classification skills to the test with the Chip Challenge.
Scientists study insects by observing them in nature and collecting them for further research. Learn their techniques so you can make your own discoveries with this article and online investigation.
Introduce younger students to space objects and how gravity affects them. Then have them explore the effects of this force with the Gravity Game.
Did you know miners must dig up and process as many as 30 tons of rock to make a single gold ring? Take a dazzling look at how gold is mined and transformed.
Test your classification skills with this leafy challenge. Examine drawings of 12 oak leaves, and see if you can determine the common and scientific name for each one of the dozen.
Can you name the mystery arthropod named for its hundred-some legs? More important, do you know what physical and behavioral characteristics it shares with a shrimp or honeybee?
The world's climate is changing. Scientists say the effects of these changes could be devastating to living things on Earth—including humans. See what scientists are doing now, and learn ways to help.
"Greenhouse effect" and "global warming" are becoming household phrases but how, exactly, are they linked? Explore the interconnections and consequences of climate change.
What can you tell from looking at a fossil record of dinosaur footprints? Everything from which dinosaur was there first to what they might have feasted on.
Try to imagine a world without horses. For starters, what would Paul Revere have used to make his midnight ride on, a cow?
Not all dinosaurs were enormous like the 84-foot-long, 30-ton Apatosaurus. TheCompsognathus, for example, approximated an eight-pound chicken. Size up two others.