Folks interested in life on other worlds have focused most of their attention on Mars lately. But Jill Tarter makes it her business to pay attention to what's going on in the other 100 billion galaxies that fill the observable sky.
Tarter is director of research at SETI (Search for Extraterrestrial Intelligence) Institute in Mountain View, Calif., where her job is to keep her ears open. The universe fairly roars with electromagnetic noise, most of which flows in randomly. If any arrived in regular pulses, it would be a good bet that something smart was doing the sending.
Tarter has been...
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