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A MIT researcher warns that the rate of autism diagnoses is increasing dramatically in the United States, with one in every two children expected to be diagnosed with autism by 2025 if the trends continue unabated. The researcher analyzed government data on autism rates and found that the number of autistic children has increased from 1 in 10,000 in 1981 to 1 in 68 currently, with boys being four times more likely to be diagnosed than girls. The causes of autism's rising rates are unclear but the researcher argues environmental factors like heavy metals, pesticides or modern life seem to be significant contributors.Read less