End Credits said:

Max_Rebo said:

but anyway 13 skeletons merge to form 1 alien what's that about?

Well, in some religions, many deities can be considered aspects of one god. I believe Hinduism is like this. I don't know about the Inca or Nazca religions, but since they worshiped what turned out to be aliens, it could have been something like that.

fsb

Maybe, but this is what I'm saying why do we have to explain it for ourselves? yes they has a hive mind but why do their skeletons merge into one being? the original films weren't like this there was actually very little supernatural content and we always knew what was going on i.e.:

Raiders - the Ark emits the wrath of god, but we saw a picture of that right at the beginning of the film so we understand what's happening.

Temple of doom - the stones heat up and burn through the bag, we knew they reacted to being close to each other from earlier in the film, there's a voodoo doll which needs no explanation and the guy can rip out hearts because he prays to an evil god but he'd already done this once so it made sense when he tried it later.

Last Crusade - the Holy grail heals people and grants long life - this is established very early on in the film so it comes as no surprise at the end.

Crystal Skull - up until the end of the film all we know is there are aliens that have magnetic skulls, the inter-dimensional portals the 13 -> 1 morphing and the 'army of the dead' are all completely unexplained.