Life Science

From the smallest microbe to the largest mammal, Life Science explores the origins, evolution and expansion of life in all its forms. Explore a wide range of topics from biology to genetics and evolution.

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Imagine a time in Earth's far-flung past when organisms didn't swim through the oceans or populate the lands. Even the mighty dinosaurs hadn't arisen. Will the planet ever return to that lifeless state?

By Robert Lamb

When a basketball superstar makes a 3-pointer, the multimillion-dollar paychecks go into his or her bank account. But why don't his or her parents get the glory? After all, didn't they provide the DNA that allowed for such incredible success?

By Molly Edmonds

We don't admit to breaking up with someone because of his looks, or that we've read our boss's private e-mails. We answer "fine" when someone asks how we are, even if we're not fine at all. Why is polite society all about the big fib?

By Molly Edmonds

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Computers can make calculations faster than the human brain. But thinking and calculating are two different things. Can computers be programmed to think for themselves better and faster than we can?

By Jonathan Strickland

When you get sick, your illness can be caused by several different factors. Learn why you get sick at HowStuffWorks.

By Molly Edmonds

Studies show that women are more sensitive to pain than men, despite their bodies' ability to withstand the agony of childbirth. Does social conditioning help men keep a stiff upper lip when they're hurt? Or do emotions and estrogen factor into this painful equation?

By Cristen Conger

Touch can be a very powerful thing that can dredge up all kinds of intense feelings. The lightest touch in the right place can induce laughter in the most taciturn people. Why?

By Josh Clark

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Think musicals are cheesy? You're not alone. But even the most cynical among us can't deny that hearing a favorite song can completely change our mood.

By Molly Edmonds

Money can buy important stuff like food and shelter, which brings a smile to anyone's face. But after you cross a certain financial threshold, how much happier can a new Jaguar and a Versace bag really make you?

By Jennifer Horton

People love chocolate. They eat it to drown their sorrows and to celebrate love -- some might say it's even better than sex. Chocolate clearly helps people feel good, but can it actually get you high?

By Josh Clark

Whether you belt out a tune in the shower, at a karaoke bar or in a choir, singing has some real, tangible health benefits. But can it also make you happy?

By Julia Layton

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Would you be happier if you had the perfect body? A better job? A bigger paycheck? Being happy with yourself is less about the pursuit of happiness and more about finding it within you.

By Shanna Freeman

Predicting the future is a tricky business. We've long been promised flying cars and robot maids, only to be disappointed year after year. What might the crystal ball have in store for us in 2050?

By Molly Edmonds

Of course they can. They do it every day when they wag and meow their undying love for you. Why are pets such a solid prescription for smiles?

By Jennifer Horton

Whether it's "Happy," "Baby Shark," or "Call Me Maybe," some tunes just live rent-free in your brain. But why do songs get stuck in your head?

By Stephanie Watson

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We talk about morals in relation to raising children, voting for political candidates and criticizing people who don't see eye-to-eye with us. But is morality even a choice? Or is it all in your head?

By Molly Edmonds

There are people who are smart, and there are people who are people-smart. The guy you want in your think tank isn't necessarily the same person you want at your birthday party. But can emotional intelligence say more about your brain than IQ can?

By Molly Edmonds

Do gender differences go beyond our reproductive organs? Popular culture would have you believe that men are from Mars, while women call Venus their planet of birth. Is it possible to finish the argument of nature versus nurture?

By Molly Edmonds

Compare neuroscientists with crackerjack detectives like Nancy Drew and Hercule Poirot, and the brain docs might come up short. After all, they have yet to crack the case on five big brain mysteries.

By Molly Edmonds

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Laugh and the world laughs with you, the saying goes. In our image gallery, experience the range of human emotions from around the world.

You only use 10 percent of that big, wrinkled mass of smarts -- unless you listen to Mozart. At least, that's what we've heard about the brain. But how many common brain beliefs are just plain wrong?

By Shanna Freeman

Parents just don't understand. Scientists didn't understand either, until they got a good look inside the teenage brain -- and what they saw turned what we thought we knew on its head.

By Molly Edmonds

We've all seen the effects that hatred has on our society, but just what is this destructive emotion? And can it be overcome?

By Alia Hoyt

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A mass extinction on Earth is long overdue, according to population ecologists. Find out what Earth's fossil record may be telling us about our future.

By Josh Clark

When you see someone else yawn, you often find yourself doing it. Yawning is contagious. But what does that have to do with the ability to feel empathy?

By Josh Clark