now I imagine some zoologists looking for the biggest lizard. They find it in the jungle,
The largest lizard is the Komodo Dragon, which likes hot and dry places. Why would zoologists be looking in a jungle?
They find it in the jungle, and exclaim "Wow! This is the biggest lizard!" and then document it. But then, they find a bigger lizard. In their awe, they also exclaim how huge this new lizard is,
I really don't think that anyone would repeatedly go "this is the biggest lizard!" Seems more normal for people to say "this is a huge lizard" or "this is the biggest lizard I've ever seen" or "I don't think anyone has ever seen such a big lizard". People aren't robots, and if you write such repetition, it'll make your readers skeptical.
Maybe I'll change it, and bigger lizards only appear when you vocalize that it is the biggest lizard you've ever seen, with whatever tone necessary. Is this new, stranger effect workable?
Assuming that someone who sees a lot of lizards doesn't get tired of constantly saying it's the biggest lizard they've ever seen. After they're wrong about three times, you'd think someone would try "wow, that's bigger than the last one" or "I wonder how many big lizards there are out there?"
when the Foundation finds it, the ecosystem IS totally wrecked.
That'll make for some serious cover-up requirements. Also, I'm wondering about the predators of the lizards. They might have overpopulated to the point where lizard populations are no longer viable.
But through the logs of the scientists, the Foundation can replicate the effect by putting reptiles inside the jungle.
Why would the Foundation want to do that when it's clear that the lizards wrecked the ecosystem? Also, see above point.