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When We Discovered Pluto, It Changed How We Saw The Solar System

On the 23rd and 24th of January, 1930, a young astronomer working in Flagstaff, Arizona, scanned a small patch of the night sky. He was taking pictures of star positions, looking for anomalies that would signal movement somewhere at the edge of the solar system. He took the pictures then set them aside, not realizing… » 7/12/15 4:25pm 7/12/15 4:25pm

You Can Thank Genetic Engineering For Your Delicious Cheese

It used to be that making cheese meant killing cows. Young cows, specifically—a few days old, at most. The stomach of an unweaned calf produces enzymes that turn liquid milk into good, hard, flavorful cheeses like Parmesan and Cheddar. These enzymes, called rennet, are secreted by mucous membranes that line the calf’s… » 6/15/15 3:17pm 6/15/15 3:17pm

What Would Happen If All Our Satellites Were Suddenly Destroyed?

Since their inception 60 years ago, satellites have gone on to become an indispensable component of our modern high-tech civilization. But because they’re reliable and practically invisible, we take their existence for granted. Here’s what would happen if all our satellites suddenly just disappeared. » 6/04/15 2:02pm 6/04/15 2:02pm

Has Humanity's Explosion Become a Population Bomb?

The world's population has exploded over the past century, growing from less than 2 billion to 7 billion people. And it's not stopping. The U.N.'s current projection is that humanity will number 9.3 billion individuals in 2050, and then hit 10.1 billion by 2100. Meanwhile, our energy resources are dwindling and… » 6/02/15 12:45am 6/02/15 12:45am

Popular Exercises To Avoid At All Costs—Unless You Do Them Right

Many popular exercises are performed incorrectly, often by people who probably shouldn’t be attempting them in the first place. This can result in injuries and futility at the gym. We talked to the experts to find out which exercises are the most problematic, and how to do them correctly. » 5/12/15 3:03pm 5/12/15 3:03pm

Your Doctor Probably Has A DNR. Here's Why You Should Consider One, Too.

Most patients receiving end-of-life care want to avoid aggressive attempts to prolong their life, but medical culture and practices often contradict these wishes. Part of the problem is due to confusion surrounding do-not-resuscitate orders. Here’s what patients really need to know about the “no code.”
» 5/06/15 5:40pm 5/06/15 5:40pm

A Glimpse Inside The Secretive World Of Human Cannonballs

Once she has lowered herself into the mouth of the cannon and slid down to the base of the barrel, Gemma “The Jet” Kirby performs a series of breath-synchronized movements that seem more suited to yoga or lamaze than to one of the deadliest stunts in circus history. This sequence is the culmination of hours of… » 4/30/15 2:45pm 4/30/15 2:45pm

The Best Way To Recover From A Break-Up — According To Science

A break-up can feel like the end of the world. And almost everybody goes through these jarring transitions at some point in their romantic lives, experiencing unbearable loss, confusion and despair. Luckily, a growing number of evidence-based strategies can help you cope. We talked to the experts to find out more. » 2/10/15 2:21pm 2/10/15 2:21pm

This Huge Engineering Project May Be Our Best Chance At Colonizing Space

Space colonization has reached an impasse, for reasons far more fundamental than a lack of money for the Space Shuttle program. There is simply no way humans can travel easily offworld without using massive amounts of rocket fuel to escape the gravity well — and that’s both expensive and environmentally unsustainable.… » 2/04/15 2:32pm 2/04/15 2:32pm

The Truth About Truvada: Can One Pill Really Protect You From HIV?

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It sounds too good to be real: You take one pill every day, and your risk of contracting HIV is reduced upwards of 90 percent. But the Pre-Exposure Prophylaxis (PrEP) program is an actual thing, which the CDC and the WHO have been recommending since last spring. Is daily Truvada as effective as it sounds, and how does… » 2/03/15 3:11pm 2/03/15 3:11pm