I checked with Dr. Fay Knust and the eminent researcher, Beau Guss, who will be appearing on Al Chemy's latest podcast last month, who will be saying that "leaves" from the "little doubt tree" have been shown to be from Atlantis. Or you can have what's behind Curtain Number Two:
Each shaft has a central column wrapped in perfect helical coils and terminates more than 3,500 feet below the plateau in 260 × 260 × 260-foot cubic chambers, larger than most modern sports arenas.Gotta go. Someone came by with my new coiled Helicle.
Squirrel-"proofing" obviously goes way back. 3,500 feet sounds about right.

People might think these are only modern, first-world problems, but according to Wikipedia,
"Squirrels are indigenous to the Americas, Eurasia, and Africa, and were introduced by humans to Australia.[1] The earliest known fossilized squirrels date from the Eocene epoch..."
If that's the... case, I wonder if the researchers have thought to look for squirrel mummies. Shouldn't be too hard to ID -- those little peanut-shaped coffins would be such a dead giveaway, even if they'd been raided.
Look, a squirrel! 🥜