Aliens and UFO

Pre-Adamites- who were them, and when did they inhabit the Earth?

In the Holy Bible, the firstborn son of Adam and Eve, Abel, was murdered by his brother Cain. Cain got angry when the Lord accepted the offering of Abel but not his. In a rage Cain murdered Abel, and because of that, he was banished by the Lord from the settlement. Cain feared that in his exile, he could be killed by anyone, so the Lord gave him a sign for his protection and a promise that if he were killed, he would be avenged sevenfold. […]