Evolutionists are very adept at promoting metaphysical speculation as "science", and William F. Martin of Heinrich Heine University in Düsseldorf, Germany, continues this tradition...
"This venerable ancestor was a single-cell, bacterium-like organism. But it has a grand name, or at least an acronym. It is known as Luca, the Last Universal Common Ancestor, and is estimated to have lived some four billion years ago, when Earth was a mere 560 million years old."
http://www.nytimes.com/2016/07/26/scien ... .html?_r=0
Apparently, this chimerical bacterium could be the proverbial "missing link" between life and non-life:
"[Martin] argues that Luca is very close to the origin of life itself. The organism is missing so many genes necessary for life that it must still have been relying on chemical components from its environment. Hence it was only 'half alive,' he writes."
Not to be out-done by this wild speculation, other "scientists" have now grafted all proto-bacteria onto their so-called "Tree Of Life"...
http://www.nytimes.com/2016/04/12/scien ... pe=article
It seems that these "scientists" have confused the "Tree Of Life" with the "Tree Of Knowledge Of Good And Evil" which most certainly is known to include social parasites, bacteria, and cankerworms....