Astronomers are searching for solar twins – stars that have nearly identical properties to the Sun. By studying the activity cycles of solar twins, astronomers are getting a better handle on the Sun’s behavior, which in turn, influences Earth’s climate.

In an interview with S&T editor in chief Robert Naeye, astronomer Jeffrey Hall of Lowell Observatory discusses a variety of issues relating to the Sun’s activity cycle, what we are learning about the Sun from the study of other stars, and what the future holds for Earth’s climate. Click here to download an 8.4-megabyte podcast of Jeff Hall talking about what we have learned from solar twins.