Astrology & Redheads
Astrologers have long claimed that a birth chart can determine what a person looks like. Astrologer Judith Hill selected area of study to scientifically test: the correlation of the placement of Mars (the "Red Planet") and redheads. Amazingly, she discovered a significant correlation between people being born with Mars rising and being a redhead, as compared to a control group of non-redheads: nearly 30% of redheads were born with Mars near the Ascendant.
One other interesting note: in Astrology, Mars rules surgery, and a strongly-aspected Mars can make for special considerations under those circumstances. Mainstream science has already established that, on average, redheads require more anesthesia than others during surgery.