On Jagger's 75th birthday, scientists named seven fossil stoneflies after present and former members of the band. Two species, "Petroperla mickjaggeri" and "Lapisperla keithrichardsi", were placed within a new family Petroperlidae. The new family was named in honour of the Rolling Stones, derived from the Greek "petra" that stands for "stone". The scientists referred to the fossils as "Rolling Stoneflies". This theme was continued when NASA named a rock disturbed by the thrusters of the Mars InSight Lander "Rolling Stones Rock", as announced by Robert Downey Jr. during the band's 22 August 2019 performance in Pasadena, California.