EVANSTON, Ill., Oct. 19 (UPI) -- U.S. astronomers say they've solved the mystery of distant stars that don't show their age, burning hotter and bluer than they should at their age.
Until now, scientists have lacked the observations with which to test theories about the so-called blue stragglers, but two astronomers from Northwestern University and the University of Wisconsin-Madison say they think they have the answer.