Quote:
Originally Posted by footfootfoot
Looking at the "ring around the corral" (bad pun) I note the grime, which leads me to wondering if they all made it a habit to congregate and poop in the area. Thermal inversion, methane, and that's HH's creeping gas theory. And methane displacing O2 is asphyxiation if I'm not mistaken.
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Methane is lighter than air, so would not work for what you propose.