I don't know if you've noticed this, but throughout a few episodes there are what seems to be scattered crystals in odd locations, Such as in the episodes The Pods, and Ocean Of Fear, and maybe more. I'm not sure what type of lead this is, but it has to do with something... right?
Great observation. Let’s talk about it.
I started googling the relationship between crystals and nuclear waste
oh and here’s a bbc article on it
but this is all Greek to me, so I only skimmed the article
I think we should also relate it back to Adventure Time—They could be related to the Crystal Dimension
And crystals can also be useful, like as a prism-gram, a device Jake used to instantly send mail and recieve a reply from Lady’s parents in the Crystal Dimension.
I don't know if this was just my imagination or not, but in the episode "Her Parents", when Jake was drawing that one picture, there was something on there that startled me. On the top of the page there appears to be some sorta UFO things hovering above the ground... I think. I don't know if Jake drew that for fun or not.. but whatever the case is, i think there is alot more to the Crystal Dimension than what has been shown O_____o
While I agree about the Crystal Dimension, I think it’s more likely that dogs are piloting the ufos in combat against the rainicorns
Or Jake just added it for effect