Sometimes great things come from small ones. Among the smallest structures we find in almost all cells are the mitochondria. Not only are they very small (about 0.001of an inch), but they are also very numerous (some of our cells have more than 2,000 of them each). And their role in life is enormous: they generate the energy molecules we use to make our bodies work.
Pablo Peixoto studies these microscopic structures. Born in Brasilia, the capital of Brazil, he became interested in science early in life. “I was one of those annoying kids who always wanted to know the underlying mechanisms of things. And when I spoke like that, my mom would ask, ‘Who are you?’ To which I would reply that I wanted to be a scientist.”