The site refers to the word "angel" and it has an error. Word "angel" doesn't derive from the word "anthelion". Angel literally means "messenger" in greek (ancient & modern) and anthelion is actually a composite greek word from "anti" and "helios" meaning opposite of the sun and it is actually a very modern term. As for the whole adrenochrome, I am pretty sure if some advanced civilization can come from light years away, then they can easily produce adrenochrome in a lab.