What has been / was your most important scientific finding? Your most surprising finding?

Question: What has been / was your most important scientific finding? Your most surprising finding?
- Keywords:
- Click on a keyword to find out more on the RSC site:
  
  achievement
  
  discovery
  
  finding
Asked by Charles2nd to Juan on 23 Jun 2016.
- Juan Ortiz answered on 23 Jun 2016:
  
  My most important finding has been the discovery of a new type of photoreceptor (something used to detect light) in bacteria. This photoreceptor is in addition dependent on vitamin B12 and this is something unique that has never been reported before.

Question: What has been / was your most important scientific finding? Your most surprising finding?