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.
If you've kept up with the news lately, you've probably heard dire warnings about avian flu, or bird flu. In this article, we'll review the basics of how viruses and influenza work, and we'll learn the answers to these and other questions about avian flu, including whether it is likely to cause a global flu epidemic.
Poison ivy is often very difficult to spot. But if you come into contact with it, you'll soon know by the itchy, blistery rash that forms on your skin. Learn how poison ivy causes that rash, and how to get rid of it.
We take it for granted that we're completely different from any other person, yet twins are unique people who are also eerily similar to each other. Learn how twinning happens and what types of twins are out there.
What exactly is fear? In this article, we'll examine the psychological and physical properties of fear, find out what causes a fear response and look at some ways you can defeat it.
Are looking for ways of raising your self-esteem? Check out what we have uncovered for elevating your self-esteem in this article.
Alcoholism can be difficult to spot. Learn the difference between heavy drinking and alcoholism, how alcohol affects the body, what factors may lead to alcoholism and what treatments are available for this addiction.
Should we bother to interpret our dreams? Are these nighttime stories random brain impulses, or do they offer insight into our waking lives? Learn what's happening in your brain while you dream.
Dozens of people are frozen in cryogenic storage facilities, waiting to be revived when science is able to cure whatever killed them. But if they're dead, is revival from a frozen state even possible? Find out.
We hear about them on the news and we listen to politicians argue for and against them using them to treat disease. Learn all about stem cells and the research, challenges and controversy that surround them.
While most flu sufferers moan and groan for about a week and then return to work, the flu season creates more than just discomfort and a costly loss of work days.
Severe acute respiratory syndrome or SARS is back in the news. A second case has been confirmed in China in the southern province of Guangdong. Learn about this potentially lethal condition.
Whether brain death is a result of cardiac arrest and lack of oxygen to the brain, or of a gunshot wound to the head, the diagnosis is the same. Learn what the term "brain dead" actually means.
Evolution is fascinating because it attempts to answer one of the most basic human questions: Where did life, and human beings, come from? The theory of evolution proposes that life and humans arose through a natural process.
The physical you is a result of your DNA, and your DNA is part of the human gene pool. Find out what the "gene pool" really is and what happens when it shrinks.
HIV continues to be a major global public health issue, having claimed more than 35 million lives so far.
Ever since I took biology in high school I have wondered -- why do humans (and plants and animals) have two of every gene, and why is one "dominant" and the other "recessive"? How does my body know which one is dominant? How does it pick between the
Every animal you can think of -- mammals, birds, reptiles, fish, amphibians -- all have brains. But the human brain is unique. It gives us the power to think, plan, speak and imagine.
Given the choice, would you rather have been born with a different eye color, hair color or skin tone? Of course, you didn't have these options, but could you have them for your own children?
Stem cells are a controversial topic because they are grown from human embryos. Learn about the controversy and get the facts here.
We can see dinosaur and plant fossils at just about any natural museum. What exactly are fossils, though, and how do they form? Find out the answers to these questions in this article from HowStuffWorks.
With movie titles like "Attack of the Clones" and "The Clone Wars," it's no wonder human cloning makes us anxious. As scientists make startling discoveries cloning animals, are humans next?
Cloning is the process of making a genetically identical organism through nonsexual means. In this article, we will examine how cloning works and look at possible uses of this technology.
What is the difference between a hardwood and a softwood? How hard does a tree have to be to be considered hardwood?
Your co-worker just yawned in a meeting, and now everyone on his side of the table is yawning, too. Learn about what might've caused him to do it in the first place and why you're likely to yawn right along with them.
Why have some bacteria become resistant to antibiotics? Learn about the role of antibiotics in drug-resistant bacteria strains.