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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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.
By Stephanie Watson & Craig Freudenrich, Ph.D.
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.
By Stephanie Watson
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.
By Katherine Neer
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.
By Leslie C. Olson
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.
By Marshall Brain
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.
By Marshall Brain
HIV continues to be a major global public health issue, having claimed more than 35 million lives so far.
By Kevin Bonsor & Oisin Curran
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.
By Craig Freudenrich, Ph.D. & Robynne Boyd
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?
By Kevin Bonsor & Julia Layton
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?
By Kevin Bonsor & Cristen Conger
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.
By Craig Freudenrich, Ph.D.
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.
By Melanie Radzicki McManus
Why have some bacteria become resistant to antibiotics? Learn about the role of antibiotics in drug-resistant bacteria strains.
The CBS drama "CSI: Crime Scene Investigation" routinely uses cutting-edge technology to solve crimes, including collecting and analyzing DNA evidence. But catching a criminal using DNA evidence is not quite as easy as "CSI" makes it seem.
By William Harris
Plants that eat other creatures? It sounds like a genetic experiment gone awry. But there's actually nothing unnatural about it; carnivorous plants have been around for thousands of years. Find out all about the Venus Flytrap.
By Ann Meeker-O'Connell
Even if you're very ticklish, you probably are incapable of tickling yourself. Learn why.
The term IQ typically refers to a score on a test that measures someone's cognitive ability. What does this test constitute exactly? Find out if IQ tests can accurately measure someone's intelligence.
Nature uses color in lots of different ways. Find out why some types of cabbage are purple and what this means.
How can the grass on the greens at a golf course be so perfect? What are they doing that's different from a normal lawn? Could my lawn look like this?
There is a good chance that if you go to the grocery store and buy a bunch of grapes that they will be of the seedless variety. If the grapes are seedless, how are they able to produce new grapes? Find out the answer to that question in this article.