What do you think is the most interesting organism that have ever existed?

Question: What do you think is the most interesting organism that have ever existed?
- Keywords:
  interesting,
  organism
Asked by Mariangel Garcia to Sinead on 12 Nov 2016.
- Sinead Loughran answered on 12 Nov 2016:
  
  I would have to say the human. Our capacity to learn, our willingness to help each other, our self-awareness, the power of positive thinking, our hunger for knowledge..all things I find fascinating.

Question: What do you think is the most interesting organism that have ever existed?