In Genesis, the serpent was used in the temptation process. After man sinned, God placed a curse on the serpent by saying, “Upon thy belly shalt thou go, and dust shalt thou eat all the days of thy life” (Gen. 3:14). The implication is that the serpent was once able to travel and move using a method other than crawling on its belly. Researchers in Israel made an amazing discov- ery several years ago, which reveals that serpents may have originally had legs.
About a quarter of a century ago, several unusual fossils were discovered in a stone quarry at Ein Yabrud near Ramallah, which is in the West Bank area of Israel. These ancient fossils were serpents with two small hind legs. There were three well-preserved snake fossils, and they were considered evidence of the most primitive snakes ever found. This discovery added credence to the verse in Genesis 3:14, implying that before the serpent was cursed it could communicate and travel in a manner other than crawling. Amazingly, these fossils of serpents with legs were found in Israel not far from Jerusalem, again showing a parallel with the biblical narrative.
From Page 8 of the Perry Stone Hebraic Prophetic Old Testament Study Bible