But it wasn't until a few years after my daughter was born when I created and taught a seminar in evolutionary medicine at Harvard, that I thought to ask, and discovered a possible answer to, the question "why?"
Però no va ser fins uns anys després de que la meva filla naixés, quan vaig crear i impartir un seminari sobre la medicina evolutiva a Harvard, que vaig pensar en preguntar, i vaig descobrir una possible resposta a la pregunta "per què?"