The human body is remarkably resilient. Your body can withstand a great deal of abuse. It bounces back to fight off many infections, repair strains and sprains, and heal broken bones. You may drive hundreds of miles in a day, fly across multiple time zones, and travel to other countries and other continents.

The world is changing. Global populations continue to migrate to urban areas. These ongoing relocations have a profound impact on deeply interconnected environmental systems and also lead to substantial distortions in human biosystems. In a word and to no one's surprise, living in big cities comes with

The world's supply of fossil fuels has been dwindling for a long time. It's been easy to pretend this wasn't happening because there seemed to be an endless quantity of oil and gas reserves. How could we ever run out? All we had to do was drill another well or lay down another pipeline. But now it seems

Marathon running is a sport that began in 1896 at the first modern Olympics held in Athens, Greece. Today, marathon road racing is big business. The Boston Marathon attracts about 20,000 participants. The New York City Marathon is twice as large, with more than 40,000 runners. Successful marathoners

We all know that 30 minutes per day of strenuous exercise will provide many health benefits. Recent Federal guidelines from the Department of Health and Human Services1 have even made this official. The real question for most of us is how to find the time to exercise regularly and consistently. All we