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Antarctica is a continent surrounded by ocean. The Arctic is the opposite, an expanse of ocean surrounded by continents.

If melted, the ice sheets covering Antarctica would raise global sea level by almost 70 meters (230 feet).

The biggest meteorite ever found weighs around 60 tons,
while some meteorites are the size of a grain of sand.

What's the Big Idea About Climate Change?

Photos: smokestack, © Ken W. Kiser; polar bears, courtesy of US Department of the Interior; sky, © Vanessa Van Ryzin; ice, © USGS; traffic light, courtesy of istockphoto.com; traffic, © Tony Tremblay; buoy, © NOAA; scientists and ice core, © AMNH; flood, © USGS; Arctic ice cover, © NASA; coral reefs, © Ian Skipworh; periwinkle snail, © USGS; girl with bag, © AMNH; house with solar panels, © Taggart Construction.

Find out more about global warming. How, and why, we should slow it?

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In Pictures: Climate Change

Photos: Ed Mathez headshot, © AMNH/D. Finnin. Satellite image of United States, Earth globe, ice, coral reef, © NASA. Smog, © US EPA. Polar bears, © US Fish & Wildlife. Flooded house, storm, cracked land, © USGS. Crowd, © Flickr.com/kaim_a. Wind power, © Glowimages/AGE Fotostock. Lightbulb, © A. Booker. Electronics, © iStock. Bikes, © M. Tarr.

Find out about Earth's climate, its consequences, and what we can do.

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Make a Terrarium

Photos: AMNH / Matt Tarr

Build your own miniature greenhouse to see the greenhouse effect at work.

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Be an Energy Saver

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Find out what you can do to save energy and slow climate change!

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What Do You Know About Climate Change?

Photos: storm photo: © CORBIS ,traffic: © Tony Tremblay, house with solar panels: © Taggart Construction

Think you're an expert on changing climate? Test your knowledge with this quiz!

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So What's Climate?

Do you know the difference between weather and climate?

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What is the Green House Effect?

Take a closer look at how the atmosphere keeps our planet warm.

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Rising CO<sub>2</sub>

Explore the connections between technology, population and rising atmospheric CO2, and find out what we can do.

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Climate Change Books

Explore weather and climate with these 6 books.

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Living on Ice

Video: "Polar bears weather the winter": Footage by David O. Brown, courtesy of the Macaulay Library at the Cornell Lab of Ornithology; "Polar bears need ice to survive": Footage by David O. Brown, courtesy of the Macaulay Library at the Cornell Lab of Ornithology; "An Inuit man sees changes": Footage courtesy of the International Institute of Sustainable Development; "Arctic sea ice is shrinking": Images created using data from the National Snow and Ice Data Center; Illustrations: Polar bear illustrations by Chris Burda

Solve these interactive story puzzles to find out how people and other animals live in the Arctic.

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Arctic Story Puzzles

Illustrations: Eric Hamilton

Solve these story puzzles to find out more about how life in the Arctic is affected by climate change. 

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Make Your Own Weather Station

Photos: courtesy of AMNH

Create weather tools to gather wind, rain, and pressure data in your neighborhood.

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Going Going Gone

Photos: How do you know when a species has become extinct?: Pacific seahorse: courtesy of Gerald and Buff Corsi, California Academy of Sciences; Illustrations: Introductory page: letters and their animations: Eric Hamilton; great auk: courtesy of AMNH Department of Library Services, #6266, extinct 1844. By Charles Hamilton Smith, from Charles Hamilton Smith, Original Drawings, 1795-1859. 23 vols; laughing owl: courtesy of AMNH Department of Library Services, #6253, extinct New Zealand, c. 1914. By John G. Keulemans, from G. D. Rowley, Ornithological miscellany, vol. 1. London: 1875.; O'ahu 'O'o: courtesy of AMNH Department of Library Services, #6286, By John G. Keulemans, from Lionel Walter Rothschild, The avifauna of Laysan and the neighbouring islands, London, 1893-1900; endangered ticker animals: Patricia J. Wynne

Why are many animal and plant species dying out forever?

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