After the experiments, they learned the genetic coding of blazes and prehistoric creatures. Turns out blazes are the chickens of the Nether. (Birds are actually dinosaurs in real life.) So they combined the fossil DNA with the blazes of today, and the experiment was a success. But after the ♤■⊙♤■●□■○■ event's, they got lose and ate all the existing blazes. Now they Nether is run by them.