What is the eatilest form of life wer have found what would they have looked like and what would they have done?

Question: What is the eatilest form of life wer have found what would they have looked like and what would they have done?
- Keywords:
  life
Asked by alexgabriel26 to Ed, Hayley, Jason, Sophie on 20 Mar 2013.
- Hayley Evers-King answered on 20 Mar 2013:
  
  They wouldn’t have been very glamourous I’m afraid! Probably just simple, single cells, without any complex internal structure. The earliest fossils they’ve found are tiny microbes and cyanobacteria (which show simple photosynthesis).

Question: What is the eatilest form of life wer have found what would they have looked like and what would they have done?