Ancient whale fossils are 37–40 million years old—the oldest ever found so far. The Wadi Al-Hitan site in Egypt is where the most complete fossil of a Basilosaurus was found. According to its fossil, the creature was about 54 feet long. Fossils of animals that the Basilosaurus ate were also discovered where its stomach would have been. Shark teeth nearby showed how other creatures ate the whale after it died.