xkcd #2872: Hydrothermal Vents ( imgs.xkcd.com )
Alt text:
Benthic Santas weren’t even discovered until the 1970s, but many scientists now believe Christmas may have originally developed around hydrothermal vents and only later migrated to the surface.
![](https://kbin.pithyphrase.net/media/cache/resolve/entry_thumb/41/80/4180cc4a659640668c80f708ece3db22f77ec018f9f9c4e17845266ed5215dd2.png)