What If

A world without cows would be a world without burgers, right? Yes, and to beef eaters that's bad news, but it would also be a world with less methane. So would losing all cows be worth it?

By Jeff Harder

Earth's magnetic field has flipped many times before, and scientists say it will flip again (though probably not in our lifetime). While it might not be catastrophic, a major change in the magnetic field would present a special set of problems.

By Patrick J. Kiger & Jeff Harder

We wouldn't stop requiring power. So how would a turn to alternative energy sources work out for transportation, international trade and our daily diets?

By Gallagher Flinn

Remove that pesky drowning risk, and the world formerly under the sea opens with possibility - despite our inefficient limbs and tendency toward hypothermia.

By Gallagher Flinn

Picture this: You're floating through space, minding your own business, when some super-scary alien attacks you. Clearly you need to defend yourself, but all you have is a handgun. Will it do you any good, or are you mincemeat?

By Karen Kirkpatrick

Coral reefs are pretty cool. More than just snorkeling destinations, they shelter tons of marine life - creatures many of us depend on for food and medicine. So what would happen if the coral reefs disappeared? Here's a hint: It isn't good.

By Karen Kirkpatrick

Cockroaches are among the most reviled creatures on the planet. They bring bacteria and allergens wherever they go - along with severe cases of the creepy crawlies. But would we really want to live in a world devoid of these little pests?

By Karen Kirkpatrick

Snakes get a bad rep. They've become so associated with dishonesty, deception and temptation that many might prefer the world just rid itself of them altogether. But creepy as they may be, it turns out that snakes are pretty handy to have around.

By Karen Kirkpatrick

Imagine going outside in the summer and not being eaten alive by mosquitoes. Yeah, no mosquitoes! Well, don't celebrate just yet, because a world with no mosquitoes might have a radically different food chain.

By Laurie L. Dove

Call up your travel agent because we're booking a one-way flight to an exotic, five-star black hole. What are you in store for on this unique journey?

By William Harris

The speed of light is like that annoying friend who beats you at every game. What would happen if humans one day surpassed the cosmic speed limit?

By William Harris & Patrick J. Kiger

It's one of those fantastic things you may have wished for at one point, like, say peace on Earth, but would a world full of cures be radically different from the one we know, or not so much?

By Susan L. Nasr

While organizations around the world are fighting to end famine, so far, no one has come up with a game-changer. Why does famine happen in the first place, and what would a hunger-free world be like?

By Jessika Toothman

Would we stick flowers in our hair and dance in the street? Or twiddle our thumbs and wonder what to do with all that new free time? Join us as we ponder a world without war.

By Robert Lamb

Would a world with ample water for all mean less disease? Fewer wars? Globally improved health and finances? Sip along with us as we wonder what if.

By Jonathan Atteberry

It's a crazy thought, but what if cancer didn't exist? And malaria, schizophrenia and every other illness that disrupts our normal functioning? Come along as we investigate what such a world might look like.

By Susan L. Nasr

Unless you've been living under a rock (one not appearing on Google Maps' Street View), you're probably intimately familiar with the behemoth and its many services. But what would the world look like if this powerhouse company had never existed?

By Nathan Chandler

Before leaving work, you'll need to check the traffic report. Lately, a disruptive T. rex has meant some adjustments to your commute. What other changes would be in store if dinos roamed the Earth?

By Jessika Toothman

Each year, approximately 4,000 people go to the emergency room for injuries caused by accidents involving electrical outlets. While this number seems high, even more people never make it to the hospital. They die.

By Katherine Neer

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

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