When Before and After Doesn't Always Show Good Results

Christina Leadlay
Published: Wednesday, 11/21/2007 12:00 am EST

Earth Then and Now
By Fred Pearce
Firefly Books
288pp. $39.95

There's nothing quite like before-and-after photos–images of what a person, place or thing used to be like, and what they look like after a certain transformation. We see these kinds of comparisons every day, in advertisements for cleaning products and beauty creams. It's always interesting to see the effects of change, regardless whether the outcome is good or bad.

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