Every dog owner at some time has probably had to deal with the "cone of shame" — the plastic collar placed on dogs to keep them from licking a spot that needs protection due to a medical issue.
And they probably have stories to tell of how much their dog hated it. But has the cone ever led to a green stain on their fur?
Geochemist Stephanie Olson unwinds a thread on Twitter about her St. Bernard, Olive, the green stain that showed up overnight when Olive had to wear a plastic cone and what it tells us about the conditions of ancient earth.
The full story involves dog drool and the cone that isolated the drool from typical air flow.
As Olson writes, she understands the science behind the stain, but she's still trying to figure out how to clean it.