Life Science

Ever had a "woulda, shoulda, coulda" feeling about something? It's called regret. What really triggers this emotion - and can we trust it?

By Dave Roos

Horseshoe crabs have blue blood that can detect toxins, a rare ability that's threatening their survival.

By Loraine Fick

It's not just your imagination - people feel freer to bail out on others at the last minute than they used to. But why?

By Danielle Douez

Scientists have found that ancient fossilized chlorophyll was dark red and purple in its concentrated form, which means that when diluted by water or soil, it would have lent a pink cast to earth and sea.

By Laurie L. Dove

Is your first memory of lying in a crib? You may want to revisit that. A new large study found that nearly 40 percent of participants had a first memory that was improbably early.

By Alia Hoyt

What happens when twins are reunited decades later? And how in the world can you explain separated twins giving their firstborn son or their family dog the same exact name?

By John Donovan

Roller coaster junkies rejoice: Riding these coasters could be a safe way to deal with your addiction to endorphins.

By Alia Hoyt

A strange, but surprisingly accurate, ancient Egyptian pregnancy test survived for millennia and was spread around Africa and Europe because it was just that effective.

By Jesslyn Shields

The noises that others make - be it walking, chewing or breathing heavily - are very noticeable to us. Yet we seldom hear it in ourselves. Why is that?

By Alia Hoyt

CRISPR is the genius behind innovations that seemed impossible a decade ago. Could you grow tomatoes with the kick of hot sauce or ferment wine that doesn't cause a hangover? That's just two of the things scientists are looking into.

By Joanna Thompson

Natural selection is the idea that organisms that are best suited to survive pass their traits down. Is it true that only the strong survive?

By Ed Grabianowski

Imagine feeling like you were born into the wrong body. People with gender identity disorder (GID) suffer persistent dissatisfaction with their gender identity. But is it fair to call GID a psychological disorder?

By Maria Trimarchi

Where did humanity begin, and how did we get to where we are now? Did we really all begin in Africa? What made us leave?

By Ed Grabianowski

Polar bears evolved to blend in with the terrain so they could hunt better. What causes one group of animals to split off from the rest of the species and develop new genetic traits?

By Josh Clark

We've all felt fury wash over us. Whether it's the guy who blurts the score to the game you TiVo'ed or the woman who lets the door slam in your face, anger is universal. You might as well learn how it works.

By Molly Edmonds

If you swim like a fish or run like a cheetah, you may understand biomimicry better than you realize. The practice involves imitating models in nature to improve technology and design.

By Robert Lamb

While HeLa cells have been star players in medical research for decades, the woman behind them remained in the shadows for years. Discover the amazing story of Henrietta Lacks and her immortal cells in this article.

By Shanna Freeman

Newly minted parents do it. Night-shift workers do it. Men and women in the service do it, too. Could you trade a continuous stretch of sleep for a bunch of naps throughout the day, too?

By Danny Bonvissuto

Are genetically modified organisms (GMOs) really bad for the environment and your health or just victims of bad publicity? We'll look at the pros and cons of this controversial subject.

By Patrick J. Kiger

Humans can certainly claim some of these, but sloths, giraffes and pandas wanted a piece of the action, too. The hyena adaptation, however, may just blow your mind.

By Kate Kershner

The great bullies that have graced the movie and television screen are mostly males, from Bluto to Biff Tannen. We tend to expect boys to throw the punches. But just because girls aren't bloodying noses on the playground doesn't mean they aren't fighting dirty.

By Molly Edmonds

Chimps share almost 99 percent of our genetic makeup. What makes up that tiny, 1 percent difference? What are the things that differentiate us from other great apes?

By Tom Scheve

Despite our best intentions, sometimes we just make bad choices. Is it possible to fight your own worst instincts? Only if you can spot these flaws in your decision making process.

By Tom Scheve

If someone tells you he or she possesses the secret of happiness, that person may also have a bridge to sell you. The things that make some people happy may lead to utter despair in others. As it turns out, humans may have to look into themselves to find happiness.

By Josh Clark

What constitutes happiness? Is it the absence of pain or an abundance of pleasure? It is simply a fortunate function of the brain? If it's the latter, then we should be able to manipulate it -- perhaps in the form of a "happy pill." It may surprise you, then, to learn that we already have one.

By Josh Clark