Question: Whats the hardest thing youve ever done

Gabriel Pérez answered on 21 Oct 2021:

The toughest scientific challenge that I have faced is improving the efficiency of a particular type of organic solar cell. It took me 2-3 years to do it! But I did it in the end which was very rewarding.

The hardest thing that I have ever done though is developing a compelling identity after leaving my country and family.