The best way to judge a scientific theory is to examine the predictions it makes about the observable universe. The more its predictions line up with the data, the more reliable the theory becomes. The less its predictions line up with the data, the less reliable the theory becomes. Since starting this blog, I have pointed out many instances where the predictions of evolutionary theory don’t line up with the observable data (here, here, here, here, here, and here). Dr. Hunter has an excellent review of several other instances. Now we can add yet another failed evolutionary prediction to this ever-growing list.
The animal pictured above is Mnemiopsis leidyi, a species of comb jelly. According to evolutionary theory, the comb jellies are “primitive.” Based on genetics, they are supposed to have evolved before some of the simplest animals on the planet: sponges. Even if you don’t believe the genetic arguments, most evolutionists would agree that comb jellies evolved well before the more “advanced” animals, such as roundworms.
One of the things that separates these “primitive” animals from the more “advanced” animals is their digestive tract. In animals like jellyfish and sponges, there is only one opening in the digestive tract. The animal must use that opening to take in food, and then later it must use the same opening to expel indigestible waste. According to the story of evolution, this “simple” digestive tract was the first to evolve, and then later, a more “advanced” digestive tract formed. In this more “advanced” digestive tract, there is one opening for taking in food and a different opening for expelling indigestible waste.
Since comb jellies are suppose to be among the “primitive” animals, evolution predicts that they should have “simple” digestive tracts. However, recent videos demonstrate that this evolutionary prediction is (not surprisingly) wrong.