The levels of carbon dioxide found in the atmosphere in modern times have been found to be nearly ten times higher than any other time since the extinction of the dinosaurs, 65 million years ago. The event that came the closest to today’s CO2 levels, the Paleocene-Eocene Thermal Maximum (PETM), occurred 55.5 million years ago, where a spike in greenhouse gasses caused global temperatures to increase by 5–8 °C over what we’re experiencing today. While the existence and cause of the PETM is well established, the source of the massive amount of CO2 that caused the temperature spike has been a complete mystery to more

September appears to be yet another doomsday month, so head for your shelters. Or perhaps not.

The latest doomsday prediction convincing the unwary concerns a comet that is supposed to collide with the Earth, this one with a near-future arrival date of mid-September. But what is the validity of this new prophesy?

Originating with an announcement by self-proclaimed prophet, Reverend Efrain Rodriguez, and propagated by conspiracy blogger Lyn Leahz, the prediction is that there is a 2.5 mile-wide comet that is emanating "hellish mystery sounds", that is on a collision course with the Earth, and will cause unprecedented climatological upheaval upon impact.
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