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Earth Inside and Out

Educator Materials A Conversation with Jacques Malavieille The mountain-building processes of folding and faulting take many millennia on Earth—and a matter of minutes in the lab. Lear... Educator Materials Forecasting Earthquakes Using Paleoseismology Don't let the "paleo" in "paleoseismology" fool you. In the world of earthquakes, "ancient" tra... Educator Materials Looking For Life In Antarctica If you want an idea of the conditions on Mars, journey to Antarctica. Take a close look at the work of an astrobiologist stud... Educator Materials Mapping Hot Springs on the Deep Ocean Floor At the bottom of the ocean, how do scientists find their way around? This marine geologist's work includes helping to create... Educator Materials Mapping Mt. Rainier Beneath the glacier-clad summit of Mt. Rainier lies an active volcano, which has more than once produced enough molten rock t... Educator Materials Retrieving a Stromatolite from the Sahara Desert Why did museum scientists travel to the Sahara to retrieve a boulder? This stromatolite was built by microbes, the only life... Educator Materials Studying Tree Rings to Learn About Global Climate By taking biopsy-like samples from centuries-old Siberian pines, scientists have reconstructed a 300-year record of temperatu... Educator Materials Ultra-High-Pressure Experimentalist Who Studies the Deep Earth The intense heat and pressure of the deep Earth are hard to imagine—and even harder to re-create. Currently, scientists need... Article Zircon Chronology: Dating the Oldest Material on Earth The mineral zircon serves as a tiny time capsule, recording geologic events—it's especially useful because the oldest discove... Educator Materials Earth: Inside and Out Glossary   Educator Materials Harry Hess: One of the Discoverers of Seafloor Spreading While the idea that continents have drifted over time dates back to the 16th century, it wasn't until the 20th century that s... Educator Materials Arthur Holmes: Harnessing the Mechanics of Mantle Convection to the Theory of Continental Drift This geologist made not one but two major contributions to our understanding of how the Earth works. Read about his geologic... Educator Materials James Hutton: The Founder of Modern Geology Until the late 18th century, most people believed the Earth was about 6,000 years old. Hutton changed this belief by proposin... Educator Materials Inge Lehmann: Discoverer of the Earth's Inner Core Each one of the thousands of earthquakes that occur every year offers a brief glimpse of what's happening deep inside the Ear... Educator Materials Milutin Milankovitch: Seeking the Cause of the Ice Ages Working without the aid of a computer, this mathematician went back 6,000 years and calculated how cycles in the Earth's orbi...