On an August day 15 years ago, eight Minnesota junior high school students on a field trip caught 22 frogs in a farm pond. At least half of the frogs had some abnormality, mostly in their hind legs. The conscientious teacher reported the group's finding to the state...

The Glover Historical Society in the Northeast Kingdom of Vermont submitted this photo to us, asking if someone knew what this mysterious crib of logs was used for. Guesses in the office ranged from a trestle pier for a logging railroad to an art project that was undertaken for no reason other than the fact that it could be done.

What do you think? The best answers will be submitted to the GHS, and we'll have them choose a winner.

Every other week we run a photo of something unusual found in the woods. Guess what it is and you'll be eligible to win a copy of The Outside Story, a paperback collection of our Outside Story newspaper columns. A prize winner will be drawn at random from all the correct entries. The correct answer, and the winner's name, will appear in next week's column.