A Climate of Extremes

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Classroom Activity Page: Higher temperatures are only part of the climate change forecast. Are current extreme weather events a sign that warming is already here? What do climate models forecast for weather around the globe? Why is it so hard to predict the climate? More »

Understanding Volcanoes

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Classroom Activity Page: Volcanoes are big movers and shakers in the business of continually redesigning the Earth’s landscape. With no concern for nearby people or ecosystems, volcanoes release toxic gases, climate-altering ash, lava and rock. How does this work? Are scientists getting better at predicting volcanic eruptions? How do areas recover after destruction? More »

Stem Cell Progress

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Classroom Activity Page: Embryonic stem cells can transform themselves into every cell in your body. As the field of stem cell research continues to evolve, the debate between the medical promises and the ethical implications persists. What are patients and researchers to do? More »

Tornadoes: Power & Fury

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Classroom Activity Page: Tornadoes are capable of serious destruction. What gets them twisting? Where do they get their energy? How can we protect ourselves when a tornado is approaching? More »

Mosquito Madness

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Classroom Activity Page: As disease-infected mosquitoes expand their range, these bugs rise higher on the “menace to human health” list. What makes mosquitoes such perfect agents for disease transfer? Is global warming a factor? How is modern technology being harnessed in the war against skeeters? More »

Polar science

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Classroom Activity Page: The poles are fascinating, partly because they are such difficult places to visit, work and live. They still guard many mysteries that we’d like to unravel, including the survival of polar animals, the history of ancient peoples, and the understanding of Earth’s climate. More »

Soil and food crisis

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Classroom Activity Page Without soil, we starve. Unfortunately, throughout the world, human activities have degraded dirt, endangering our ability to feed a growing population. How can we save our soil and get ourselves out of a food crisis? More »

Flu vaccine

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Classroom Activity Page: Each year, as influenza season approaches, medical authorities must scramble to predict which strains of flu will be most important, and then grow enough vaccine to inoculate the population. Why does this take so much time, and what are some alternative strategies that might speed the process? More »