Jade has been used by people around the world for thousands of years—first to make tools, later to create precious works of art. Take a peek into mineralogist George Harlow's scrapbook to see why he thinks this rock is so special.
Mundo Shamundo! With the help of these magic words, the Amazing Mundo can literally reverse the sands of time. Watch him transform worldly objects ... back into rocks in this fun comic strip.
Surrounding Earth is a layer of air, the atmosphere, where conditions are always changing. Try your hand at predicting weather patterns by making a wind vane, a rain gauge, and a barometer.
What is the gold standard? How does an alloy differ from a compound? And what happens when a metal tarnishes? Find out with this glossary from "alloy" to "volume."
How does gold form and what does it take to extract it from the earth? You'll find everything from colorful field guides to tales about the quest for gold in this list of kid-friendly titles.
What are squamata? Why is the term "cold-blooded" incorrect? And how does chemoreception work? Find out with this glossary—from "adaptation" to "vertebrate."
Want to learn more about the legged and legless lizards known as squamates? You'll find everything from colorful field guides to tales of unusual behavior in this list of kid-friendly titles.
Search a database with more than 8,300 reptile species. Learn about amphibian biology and conservation. Review the evolutionary history of squamates. And find hands-on science activities.
Explore the McLaughlin gold mine in Northern California. See the first metal coins, which were created in the Middle East around 600 BC. And investigate the properties of gold.
Put your viewing skills to the test—and explore the Museum's Frozen Tissue Collection—with this mystery photo challenge.
Can you tell the difference between a leech's jaw and its back sucker? Test your knowledge of these blood-thirsty worms.
Can you tell the difference between an Emmy award and an Olympic medal? Test your knowledge of gold-plated objects. Then find out more about gold!
For billions of years the greenhouse effect has made life possible on Earth. Build a terrarium—your own miniature greenhouse—to see this process at work.
Follow mermaids around the world and throughout history to see first-hand how cultures share and reinterpret mythic creatures.
Setting sail without a map wasn't the only concern facing European explorers. Their heads had also been filled with tales of monsters lurking in the oceans' depths.