Well sure, a reptilian off world humanoids visiting earth 100,000 years or 6000 years ago and then written into legends....etc ok, possible, I mean it’s possible that non earth humanoids or non humanoids have visited the planet at some point.

Here’s just too many star systems with habitable zones not for there to be life elsewhere. But still aware of Fermis paradox.

I tend to lean onto the side that Icke uses the lizard people thing more as an analogy or bigger philosophical big picture thing or maybe shorthand I’m not quite seeing. Because long enough ago, we are related to and come from lizards that evolved from fish that came onto land.

Saying that I haven’t heard him lately mention it again, so perhaps he doesn’t mean that literally there’s lizard people.

Didn’t the asteroid that wiped out the dinosaurs essentially kill most mammals? I would imagine an impact of that nature would vaporise anything on the surface and caves would be no respite.