Add Yahoo as a preferred source to see more of our stories on Google. When you walk in the door and kick off your shoes, does it actually hurt the health of your feet to walk around barefoot on hard ...

A lot of us track how many steps we take every day. But it's a safe bet that you're not close to Paul Salopek, who's walking across the world. He's halfway through his years-long journey known as the ...

This is your first of three free stories this month. Become a free or sustaining member to read unlimited articles, webinars and ebooks. The following is an excerpt from “The Cities We Need: Essential ...