I created a chart a few years ago that I can update to show the exact age of the justices:
John Paul Stevens 87.74
Ruth Bader Ginsburg 74.84
Antonin Scalia 71.85
Anthony M. Kennedy 71.48
Stephen Breyer 69.42
David Hackett Souter 68.33
Clarence Thomas 59.56
Sam Alito 57.79
John Roberts 52.97
I wonder if people in IL even know that John Paul Stevens is one of them.