Hunt for Intelligent Aliens Should Focus on 'Transit Zone'

Researchers have identified and characterized many potentially habitable alien planets via the "transit method," which notes how parent stars' light changes when orbiting worlds cross these stars' faces from Earth's perspective. Intelligent aliens could theoretically use this same strategy to discover Earth, and to determine that it has the ability to support life, scientists said. Advanced aliens who have made such a detection might try to send Earth a message to get in touch, the reasoning goe