WWW: This One Hates Change
A microbial community discovered in Western Australia hasn’t changed its DNA in nearly roughly half a Sagan, 1.8 billion years to be more exact.
This lack-of-variation was determined by comparing the contemporary data to community fossil data from 500 million years ago and data from 1.8 billion years ago, and interpreted to examine the mid-Precambrian increase of atmospheric oxygen. The cultures found 4-12 inches deep in mud on the ocean floor would not have been subject to surface environmental changes.
According to the null hypothesis of Darwinian evolution, a lack-of-change in a biological or physical environment of an ecosystem will result in a similar lack-of-change. This bacteria may be evidence to support this null hypothesis, though more evidence is required for Darwin to be considered “proved right,” as many news outlets have reported.
The study was published in the Proceedings of the National Academy of Sciences of the United States of America
Image Source: UCLA Center for the Study of Evolution