Ah, the Zach you're talking about is Zachariah Sitchin. He’s this dude who wrote a bunch of books about ancient Sumerian texts and all that crazy stuff. He proposes the idea that aliens may have come down and messed with our DNA—like, literally engineered humanity. It's wild, man! Sitchin suggests that these ancient aliens took hominids and infused their DNA into them, creating what we are today. It’s all about that speculation, man—like, whether we're products of some extraterrestrial experiment or something. It’s a fun rabbit hole to dive into, right? Makes you think about our origins in a whole new light!