252 million years ago the world suddenly became desolate of lifeforms that had been there thousands of years ago. Wiped out after all this time and we have only thought that methane from large volcanoes was to blame, however, new research shows that maybe it wasn't just the gas but also a microbe that helped the gas become so prevalent in the air that it caused mass extinction. All those years ago about 90% of the earth's population was wiped clean due to toxic amounts of methane in the air. Scientists always thought the cause for such a catastrophic event was volcanoes emitting the gas. However, these new studies show that a bacteria named
Methanosarcina is partially to blame. This bacteria munches away at carbon and in turn produces large amounts of methane. Which can be converted into CO2 by other microbes, this is the cause of the lack of oxygen in the air what caused these species of creatures to just start dropping like prehistoric flies. This microbe obtained the ability to convert CO2 into methane at around 250 million years ago, about the time the species were dropping dead. It's amazing how microbes can react and change the world around us by acquiring one simple new trait, it's scary at the same time.
The author was very good about sticking to the facts; and giving quite a lot of them. This article was fantastic to write a lot about because of all the information found within it.
http://www.windows2universe.org/earth/images/KTextinction_big.jpg