(b) Why were the frogs worried ?
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Kids first noticed the problem. On a field trip to a pond one day in 1995, Minnesota middle-school students discovered something really weird: one-legged frogs, stumpy-legged frogs, frogs with extra legs.
The kids were spooked.
More amphibian deformities turned up, not just in Minnesota but in other spots in the United States and around the world. A few scientists had known amphibians were in trouble, but the students' discovery called global attention to a problem that turned out to be more serious than previously thought: the mystery of the malformed frogs.
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