Tiny 'lab-on-a-chip' detects pollutants, disease and biological weapons

For centuries, animals have been our first line of defense against toxins. A canary in a coalmine served as a living monitor for poisonous gases. Scientists used fish to test for contaminants in our water. Even with modern advances, though, it can take days to detect a fatal chemical or organism.

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<p><a href="http://www.physorg.com/news154097769.html">Tiny 'lab-on-a-chip' detects pollutants, disease and biological weapons</a></p> <p>For centuries, animals have been our first line of defense against toxins. A canary in a coalmine served as a living monitor for poisonous gases. Scientists used fish to test for contaminants in our water. Even with modern advances, though, it can take days to detect a fatal chemical or organism.</p>