In honor of the fact that today is the coldest day we've had so far this winter, amazing pictures of Niagara Falls when they froze over. The actual year the photos were taken is in dispute (the claim is 1911), but the photos themselves are real.
A different kind of cool: How did Volkswagen Sweden make it more fun to walk up the stairs instead of defaulting to the escalator?
(For a discussion of what prompted the Smile a Day column, see an earlier post)
Click here for my book (one of O: The Oprah Magazine's 10 Titles to Pick Up in May; with Foreword by New York Times columnist David Brooks): The House on Crash Corner and Other Unavoidable Calamities—about the sad, hilarious and meaningful ways we deal with the crises in our lives.