My answer is a resounding "NO" to both of the above. The anomalies in the photo are once again dust particles in the flash - I guarantee it. I admit the one orb in the lower center is a bit brighter than the rest, but the sheer number of white circles indicates a high concentration of particulate matter in the vicinity, so I have to discount them all. In other words, the conditions under which this was taken is too questionable. If you see a photo with more than a few orbs (like dozens or hundreds) then it is completely atmospheric.
In the photo on the left, notice that the orb just above the investigator's head is far dimmer and has a haziness as opposed to the one above. Also, it is obvious (and necessary) that a flash was used. In my opinion, this is a reflection off of a dust particle. Ditto for the photo on the right.
Is it possible that an elaborate hoax could have included a manipulated photograph among the items of a museum exhibit, only to have it put online and finally exposed as “time travel proof” later? Well, it would be quite an elaborate hoax, but it is possible.