Of course, there are other evidences.

Such as, the museum's unnaturally biased security system.

What?

Why were there no monitors in the security room keeping watch on the dinosaurs' fossils...

As if you installed all of those camera for only one orb.

Naturally... because aside from the orb, all of the other things have no value to keep watch over.

Also, that day in the security room, you said this...