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Science

Galileo was the first to discover the moons of Jupiter.

Galileo’s Revolutionary Vision Helped Usher In Modern Astronomy

The Italian scientist turned his telescope toward the stars and changed our view of the universe

In the '80s, the challenge was to limit acid rain from power plants; now, it's to cut carbon emissions.

The Political History of Cap and Trade

How an unlikely mix of environmentalists and free-market conservatives hammered out the strategy known as cap-and-trade

Although the lander may appear “flimsy and gangly,” says NASM curator Allan Needell, the craft represents “a very pure design built for a very specific mission.”

Apollo 11’s Giant Leap for Mankind

When the lunar module landed on the moon, it provided an unforgettable moment for the millions watching back on Earth

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Five Favorite Penguins Outside Antarctica

Of all the species of penguins, more than half can be found only outside Antarctica. One of our favorites is in the Galapagos

Meteor Crater in Arizona is 4,000 feet wide and almost 600 feet deep.

The Ten Most Spectacular Geologic Sites

Smithsonian picks the top natural wonders in the continental United States

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Weather vs. Climate

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