The incidence of autism is growing at an alarming rate. Experts are struggling to discover why. Slowly, a strange and complex picture is coming together. It suggests that autism’s mysterious mechanisms could ultimately reveal health truths relevant to us all.

A roundup of the potential health problems from diet soda consumption.

International travel doesn’t always require a passport. Here are six U.S. cities where you can immerse yourself in other cultures – without going through customs.

Jen Sinkler, our fitness editor, wrangles leading experts to address your most perplexing workout quandaries and conundrums.

Studies show that positive immune benefits can last up to a month after a visit to the woods.

If you’ve been relying on machines for your resistance training, try working with free weights, too. You’ll develop better coordination, use more muscle groups and see better results. Here’s how to get started — and get stronger, fast.

On May 16, 2010, Colorado native Christy Mahon became the first woman and the seventh person ever to ski all 54 of Colorado’s 14,000-foot mountains, affectionately known as the “Colorado 14ers.” Because she kept her mission under the radar, her victory came as a surprise to many. Not to her husband, Ted Mahon, though, a mountaineer and ski instructor who accompanied her on every climb and descent.

Spend some time eating, drinking and walking as the French do, and the “French paradox” may not seem like such a mystery after all.