The antelope's horn is prized for supposed medicinal and magical powers in many places. The horn of the male saiga, in Eastern practice, is ground as an aphrodisiac, for which it has been hunted nearly to extinction. In the Congo, it is thought to confine spirits. Christian iconography sometimes uses the antelope's two horns as a symbol of the two spiritual weapons Christians possess: the Old Testament and the New Testament. The antelope's ability to run swiftly has also led to their association with the wind, such as in the "Rig Veda", as the steeds of the Maruts and the wind god Vayu. There is, however, no scientific evidence that the horns of any antelope have any change on a human's physiology or characteristics.