Although many of the mass animal deaths reported around the world in the past month remain unexplained, officials have closed the case on the mystery of 200 cows that dropped dead in Wisconsin on January 14. A toxin from moldy sweet potatoes, which were a part of the animals' feed, are to blame for the bovines' seemingly strange demise.

200 Dead Cows Mystery Solved In Wisconsin: Toxic Moldy Potatoes To Blame