Jewish Life - Lab Meat

As it is taught in a baraita that Rabbi Shimon ben Menasya says: Woe over a great attendant that has been lost to the world; as had the snake not been cursed that it should go on its belly, there would have been two fine snakes at the disposal of each and every one of the Jewish people. One he would send to the north, and the other one he would send to the south, to bring him precious sandalbonim, a type of precious stone, and other precious stones and pearls. Moreover, he would attach a strap under his snake’s tail like a harness to an animal, and use it to take dirt out to his garden and to rebuild his ruin, as he does with other animals. This demonstrates that the snake was capable of performing labor. The Gemara raises an objection from a baraita to the assertion that eating meat was prohibited to Adam: Rabbi Yehuda ben Teima would say: Adam, the first man, would dine in the Garden of Eden, and the ministering angels would roast meat for him and strain wine for him. The snake glanced at him and saw his glory, and was jealous of him, and for that reason the snake incited him to sin and caused his banishment from the Garden. According to this, evidently Adam would eat meat. The Gemara answers: There the reference is to meat that descended from heaven, which was created by a miracle and was not the meat of animals at all. The Gemara asks: Is there such a thing as meat that descends from heaven? The Gemara answers: Yes, it is like this incident: As Rabbi Shimon ben Ḥalafta was walking along the way, he encountered those lions that were roaring at him, intending to eat him. He said: “The young lions roar after their prey, and seek their food from God” (Psalms 104:21), and they deserve to receive food. Two thighs of an animal descended from heaven for him. The lions ate one of these thighs, and they left the other one. He took it and entered the study hall, and inquired about it: Is this thigh a kosher item or a non-kosher item? The Sages said to him: Certainly it is kosher, as a non-kosher item does not descend from heaven. In connection to that story, it is related that Rabbi Zeira asked Rabbi Abbahu: If the likeness of a donkey had descended for him, what would the halakha have been? Would it have been permitted? Rabbi Abbahu said to him: Foolish bird [yarud nala]. The Sages already said to him that a non-kosher item does not descend from heaven; therefore, it must be kosher. §

Rav Ḥanina and Rav Oshaya would sit every Shabbat eve and engage in the study of Sefer Yetzira, and a third-born calf [igla tilta] would be created for them, and they would eat it in honor of Shabbat. §