A previously unknown bacteria life form, recently featured in Berkeley Laboratory's study in Nature Communications, is as small as a living form possibly can be while still retaining the minimum cellular essentials.

The microbes have an a average volume of 0.009 cubic-microns and about 150,000 of them could fit on the tip of a strand of hair. 

According to Jill Banfield, a co-author of the study, "These newly described ultra-small bacteria are an example of a subset of the microbial life on earth that we know almost nothing about." This such detailed images of the life form have been produced.