It's explained later in the report. A very large impact was discovered in the Yucatan. Its age puts it at about the time the dinosaurs vanished and it's size placed it in the "extinction event" level.
It's probably still a theory, but for the most part they consider this to be the one that killed the Flintstones.
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Natural gas (methane, mostly) is very hard to store.
That still no excuse for farting in church.
After further analysis of these "pulse trains" a brief radio transmission was detected: "We keep tubs clean so you don't have toooooooooooo!"
It's explained later in the report. A very large impact was discovered in the Yucatan. Its age puts it at about the time the dinosaurs vanished and it's size placed it in the "extinction event" level. It's probably still a theory, but for the most part they consider this to be the one that killed the Flintstones.