Scientists often test the claims of astrology. Efforts to prove the claims, invariably, fall short. Based primarily on French athletes, this work attempts to claim that there is a correlation between military men and Jupiter, scientists and Saturn, sports champions and Mars.

Seven distinguished French scientists, representing the French Committee for the Study of Paranormal Phenomena, have published a study in which they examine the birth data for 1,066 French sports champions culled from two leading Who's Who anthologies focusing on athletes. They find no statistical evidence for the claim that there is a Mars effect. Moreover, they attribute the so-called effect to selective bias on the part of the chief proponent of the claim, the late Michel Gauquelin (d. 1991), who had attempted to persuade them to add names to or delete names from their study.