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Earth: A Primer on the Third Rock From the Sun

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Earth is an enormous and extremely complex planet. Learn about the inner workings of the planet Earth and find out what forces are constantly at work on Earth.

Which Planets Are Considered 'Earth-like' and Why?

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Exoplanets are planets that orbit stars other than our sun. Read about exoplanets and find out how scientists are searching for exoplanets with life.

A Comprehensive Guide to the Layers of the Earth

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Delve into the Earth's layers: crust, mantle, outer core, and inner core. Discover the secrets beneath our feet and the dynamic processes at play.

Turns Out Earth's Pulse 'Beats' Every 27.5 Million Years, But Why?

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Researchers have been asking this question for almost a century and now we're a little closer to the answer. Something else to ponder: Every 27.5 million years there is usually a mass extinction.

When Is the Earth Going to End?

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The end of Earth will likely come about because of the sun in our solar system. This much you might already know, but we actually have an approximate date.

How the Metric System Works

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Ever heard of a little unit called a femtometer? Can you tell us how much you weigh -- in petagrams? We know you can't, so hurry up and start reading. We have work to do.

How the Living Earth Simulator Will Work

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You may have noticed that our planet isn't terribly predictable. Could a German polymath and an unfathomable pile of data change that?

What will Earth look like in 5,000 years?

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The Earth in 5,000 years would be a very different place because of climate change. Learn about the Earth in 5,000 years.

How the Space Launch System Will Work

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Have you met the driving force behind the U.S. space program for the foreseeable future? Take a second to get acquainted with the proposed blasting behemoth.

Has Earth reached its carrying capacity?

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Carrying capacity is the idea that sustainability requires balance. Learn about carrying capacity and human population.

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