Title text:
Mantle plumes explain Hawaii, Yellowstone, Iceland, the East African Rift, the Adirondack uplift, the Permian extinction, the decline of Rome, the DB Cooper hijacking, and the balrog in Moria. Those little hills of sand in your yard are caused by antle plumes.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3141/
Ah so they're like the dark matter of astrophysics, or the religious ceremonies of anthropology
There are so many 'cult objects' in anthropology that are probably just sex toys.
They can be both!