Science Versus Myth

Long before crop circles captured the world's imagination, a Peruvian culture called the Nazca went about creating a series of intricate lines -- sometimes in the shapes of animals -- on the desert floor. But how'd they do it -- and why?

By Kate Kershner

Obviously, if we had more evidence of the existence of ghosts, we wouldn't all spend so much time debating the matter. Believers in the supernatural, however, are convinced a substance called "ectoplasm" proves ghosts are real -- but are they right?

By Kate Kershner

Solar flares disrupt Earth's magnetic field when they hit the planet, causing issues with power and GPS. But if a major solar storm hit Earth, the consequences could be catastrophic.

By Laurie L. Dove & Desiree Bowie

If you don't recycle, you should. If you do recycle, you should do more. And what if everybody in the world started to recycle? At the very least, it would help us attack that enormous plastic patch in the middle of the ocean.

By Laurie L. Dove

It's a strange thing to think about, but have you ever wondered what would happen if the ozone layer suddenly wasn't there? Here's a hint: Getting a bad sunburn would be the least of your problems.

By Laurie L. Dove

Remember learning about photosynthesis when you were a kid? Let's pretend for a moment that this vital process could somehow permanently stop. How tough would it be to continue to live on this Earth?

By Laurie L. Dove

Picture the smells of a warm, sunny day in July. To your left, a neighbor is barbecuing. To your right, someone has put a warm apple pie on the windowsill to cool down. Smells great, right? So how does sunshine factor into all of this?

By Kate Kershner

From tropical islands to arctic tundra, we humans appear capable of living just about anywhere. But do different groups of people fare better in certain types of climates, or are we just really good at adapting to the environment around us?

By Kate Kershner

Our early ancestors, enjoying the effects of rotten fruit, had stumbled onto something big. How did alcohol serve as a nutrition source and, some believe, help motivate hunters to take up farming?

By Gallagher Flinn

There'd be some sacrifices. But bird-people society would have its advantages: interchangeable parents, sophisticated gardening skills and a close relationship with trees.

By Gallagher Flinn

Income inequality contributes to societal ills. Would mandating equal paychecks for all improve the situation or lead to work-shirking and massive government?

By Gallagher Flinn

When it comes to eating certain questionable foods - like unrefrigerated potato salad - most of us know to stay far away. But what about moldy bread? If you cut the offending areas off, is it a risk worth taking or a ticking time bomb?

By Karen Kirkpatrick

Say a guy mistakes "the Pill" for a breath mint. Is he going to have any lasting side effects if he takes one? What about if he took it regularly?

By Alia Hoyt & Karen Kirkpatrick

Tons of planets have more than one moon. Heck, Jupiter and Saturn have more than 50 each, and they seem to be doing just fine. So why is it that the idea of a second moon for Earth has scientists throwing up red flags?

By Karen Kirkpatrick

Double the suns means double the suntan, double the solar energy and double the awesome sunsets, right? Well, not exactly. Having two suns might sound fun, but it would probably make for a pretty different environment here on Earth.

By Karen Kirkpatrick

We all know what Viagra does and why men use it - not to mention how much money this particular prescription drug has made over the years. But does it improve sexual health for women, too?

By Karen Kirkpatrick & Jennifer Walker-Journey

The Earth is a pretty stalwart planet, having survived billions of years of punishment at the hands of asteroids and other cosmic bodies. But could it withstand more than 7 billion people jumping up and down in unison? Do we even want to find out?

By Karen Kirkpatrick

She's a Disney princess, a Starbucks Coffee logo and a metaphor for transformation. Occasionally, she's even "photographed." Why are humans so fascinated with these creatures?

By Julia Layton

China's government imposed mandatory IUDs and mass sterilizations, among other measures. That's some serious micromanagement. Was it necessary to avert a population disaster?

By Gallagher Flinn

If minerals make up so much of the Earth, why would we ever face shortages? The availability of the resources we use to create products often depends more on our priorities than the planet's supply.

By Gallagher Flinn

Assuming we got to keep the sun, how bad would be for travelers to not have these little guiding lights? And what else might have changed in history without stars?

By Gallagher Flinn

People would look underground for water and maybe just stay there to escape the fiery hell on Earth's surface. But could humanity really last without the seas?

By Gallagher Flinn

Sure, Saturn's luminous rings are a cosmic marvel, but did you know that Earth once had rings? If we still had them today, what would they look like?

By Laurie L. Dove

The undead are frightening, brain-hungry monsters, lumbering toward their victims with great purpose. But wait. Can they even digest brains?

By Nathan Chandler

Your dog just swallowed a plate full of chicken bones. Is he really in serious danger? The short answer: yes. Find out why you need to get him to a vet immediately.

By Jeff Harder