On a trip to Tokyo, I wanted to see if the dehydrating effects of long distance air travel could be visually demonstrated. (Apparently I did not bring enough to read.) Using an olive as my test subject, I photographed it every hour for the 17 hour flight. Excusing my lack of photographic skill, you can clearly see that the olive shrinks to less than 1/2 its natural size. So what is the learning? Drink less booze and more water on long trips! I wish I had actually taken my own advice.