In the Urns you have the Ampules containing DNA materials.
The guy is clearly deformed and way much taller...
Oh and in the hologram room (wich is clearly Engineers tech, in some Engineers ship) you can see a human in the middle platform. He looks tiny compared to the seat on the foreground or maybe it's just perspective...
Wonder if the humans discover nothing alive from the Engineers, but their technology.
They mess with it, some get transformed into Engineers, others into weirder creature...
It's the legacy of our creators and we f**k it up.
I like what Ridley said "we think that we are small, but we discover that we are huge...".