A Shofar is a natural instrument made from animal horn that has been in use since Biblical times. There are two basic kinds of shofars: the Yemenite and the Rams horn. The rams horn shofar is considered by many to be the more genuine shofar. When Abraham was on the verge of sacrificing his son, Isaac, God send an angel to stop him. Abraham looked up and saw a ram caught by the horns in the thicket. This ram was provided by God for sacrifice in Isaac’s place. Some say than Abraham took the horns of this ram, cleaned them and made the first shofar.
The Yemenite Shofar has a much more recent history. The Jews of Yemen (a country on the tip of the Arabian Peninsula) had no access to the horns from rams. Therefore, to make shofars and fulfil the mitzvahs of sounding the shofar, horns from the Kudu, a type of antelope, were brought from Africa. These were brought across the narrow Bab el-Mandeb Strait. The kudu fulfilled the standards for making a kosher shofar. Yemenite shofars can be quite spectacular; they are elongated spirals in shape and have a deep resonance which some liken to an echo off a mountain.