Life is a complex chemical system. So what better way to discover alien life on planets outside our solar system than by using chemical methodologies. Of course we can't send a chemistry lab to a planet circling around another star far from our Sun. But we can use the science of spectroscopy to study the electromagnetic radiation that arrives to our Earth from distant planets. That is exactly what Garik Israelian is doing. Listen to him explain how the technology of spectroscopy can be used to detect alien life on planets far, far from here...
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