now that's a fantastic entry to the challenge!!! wonder how this is affecting human beings. have you seen any studies? ...speaking of fuel additives, well have you heard of percholate (rocket fuel)? it's in our milk...in our food. Do a quick google search and you'll learn a lot about it. US government just dumps rocket fuel on the soil. it's gets in our soil & water. we eat and drink it. sigh It causes health problems in humans. i'm sure it's affecting these bullfrogs too. Have you ever wondered why the governmnet just keeps dumping rocket fuel onto our land? they're the big bad government. they can get away with it!!! Pretty soon I'm afraid human beings are gonna start quickly disappearing right along with these poor bullfrogs. Joe, PLEASE forgive me for digressing here!!!!!!!!! You bring up such an important issue...contaminants...and our government needs to address this. Wonder if other countries have the same problems????? How will this affect humans, Joe? any idea? I mean, if reverse osmosis is affecting frogs, it's gotta be affecting other animals, right? we eat the animals. Aren't we in just as much danger as these bullfrogs? Is reverse osmosis the process that most cities use? I'll have to read more about this! thanks again for a fabulous entry! are you a scientist?