Best of Pop Quiz 2010

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Moon Mysteries and Myths Quiz

For every fact we know about the moon there are a hundred superstitions, legends, and mysteries. See how well you know your lunar lore.
Brain Quiz

Are you a brain when it comes to the brain? Find out with this quiz and give your gray matter a workout in the process.
Solar System Quiz

Our solar system is filled with mysterious and often mind-blowing phenomena. Do you know asteroids from meteoroids and Venus from Mars?
Stress Quiz

How much do you know about stress and how it affects your body? Take the quiz and find out—but don't stress about it.
Air and Space Quiz

Think you know the Smithsonian National Air and Space Museum inside and out? Test your aeronautics IQ with our carefully curated questions.
Moon Landing Quiz

How much do you know about U.S. Apollo missions?

Blog: Breaking Orbit

Zodiacal Light Rising

Once mistook for campfires and volcanoes, the faint cone of light caused by interplanetary dust will be visible for the next two weeks.
Sizing Up the Supermoon

Just how much bigger than average was Saturday's supermoon? Princeton professor Robert Vanderbei uses lunar pictures to crunch the numbers.
Mercury MESSENGER 101

As NASA's first Mercury orbiter approaches the tiny planet, get the facts behind the mission and find out what scientists hope to learn.

Blast Off!

Take off with the National Geographic Angry Birds Space book as the birds fly through space on an intergalactic rescue mission.

Iceland's Resilient Beauty

Over the centuries, humans (and sheep) have taken a toll on the volcano- and glacier-shaped landscape. But what remains is still spectacular.
Civil War Sketches

Browse through a gallery of historical illustrations depicting both the horrors of battle and the moments of grace, as captured by skilled battlefield artists of the American Civil War.
Apostles Photo Gallery

They were unlikely leaders. As the Bible tells it, most knew more about mending nets than winning converts when Jesus said he would make them "fishers of men." Yet 2,000 years later, all over the world, the Apostles are still drawing people in.