NOTES

Talk addressed to the school members, closed to the general public. Context: "21a Setmana de la Ciència, Dia de la Ciència a les Escoles, "La Ciència en primera persona"". Over a hundred lectures throughout Catalonia addressed to secondary school students are planned within the lecture series "Science in first person", 21st week of Science . These sessions are conducted by researchers who explain their work, both in its scientific as human side.