Sarah Kliff

The site nurses my worst self-indulgent instincts. Does anyone really care that I love penguins?

Not ready for the full distance? Try half-marathons.

The right fluids are essential for athletes, especially in summer. A new line of all-natural sports drinks provides much-needed electrolytes, energy and hydration but ditches the unhealthy high-fructose corn syrup found in most mainstream varieties.

Classes with chocolate, without clothes and other new ways to practice.

For not the first time, flash floods shut down or delayed New York City's entire subway network on Wednesday. A transportation expert says it's just another sign of America's decaying infrasctructure.

A new study says that how we choose our friends is strongly influenced by genetic factors.

Some of the most common exercise routines could be turning your gym sessions into wasted time. Here's how to make every minute count.

A revolutionary type of brain stimulation may bring new hope to victims of major brain trauma trapped in a minimally conscious state.

After a successful series of infertility treatments, Kristen Cohen and her husband, Lee, had two sets of twin boys, now ages 6 and 2. They also had about a dozen embryos that they no longer needed but could not imagine going to waste. "We went through so much to create these embryos," says Kristen. "This was much more than blood, sweat and tears." The Cohens had also benefited firsthand from medical research; Lee, who has cystic fibrosis, has been helped by advanced treatments.

A weekly look at the nutritional value, or lack thereof, of some of our favorite foods.

It's not just what you eat that matters. How you dine can play a major role in your weight and digestive well-being.

Why dermatologists remain skeptical.

A weekly look at the nutritional value, or lack thereof, of some of our favorite foods.

A new study finds that most sunscreens don't offer sufficient protection. How to find the right one.

Want to fit into that bathing suit all summer long? Eight hot-weather treats you should avoid.

College students now have more to stress about than finals: they are as much at risk for serious diseases, like diabetes, as their parents or grandparents.A new study of 800 undergrads at the University of New Hampshire found many students had risk factors ranging from high cholesterol to low bone density.

To peel or not to peel? For apple lovers, that is the question. An apple's peel contains many important nutrients that, according to new research, can help fight cancer.