Only Slate Plus members can gift Slate stories. Become a member to share 10 free articles a month. I am privileged to teach in one of the world’s most respected economics departments. We’re on pretty ...

Source: "Escalator and Stairs." Image by Karen Mardahl, Wikimedia, CC2.0 The Question “What if life came with little reminders to make healthy choices?” This intriguing question headlined an article ...

Can pedestrians be convinced to make healthy choices when an escalator seems so much faster and more convenient than a staircase? Yes: you just have to make sure that the stairs are far, far away from ...

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Sound Transit has come around to the idea that in dire circumstances, it’s OK to use a stalled escalator as stairs. But that’s only when no other escalators or staircases are available. And those ...

Stand on the right. Walk on the left. Don't yell at strangers. One of these is apparently controversial. Here’s what happened: Jordan and his partner were at the mall—no regular stairs anywhere nearby ...

Researchers have developed an energy-recycling mechanical staircase they hope will one day help older adults or those who are mobility-impaired. The device uses little power and can be placed on ...