[email protected]: Scientists challenge the need for animal testing

Each year, thousands of new chemicals come onto the market, and very few of them are ever tested before their effects on humans are fully known. 

Animals -- primarily rodents -- are used to determine how these chemicals in our everyday lives will impact us. But testing on animals is time-consuming, expensive, and not always accurate. That's why Brown researchers wondered if there was a better way. What followed was a remarkable invention that changed the way researchers could study chemicals faster and cheaper -- and without the animal.

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