"Finally, this nightmare of hunger and death is over." Paul Simon wrote his first uncensored letter on April 12, 1945, the day after being liberated from the Buchenwald concentration camp, located on the Ettersberg hill near Weimar in central Nazi Germany. "You cannot imagine what we have seen in this hell; naturally, I could not let you know in my previous letters," he detailed to his wife, Louise, his Chouquette tanto aiméeAlong with this letter, Simon also sent her some sketches, rescued from his memory, depicting scenes from a horrific everyday life. A cartload of corpses, a flood of desperately starving people, a man with no will to see tomorrow. Louise hid them in an old cloth-covered folder until her death on October 9, 2006, in a nursing home in Saint-Hippolyte-du-Fort (Gard). "How many friends will never see France again? How many died in my arms…?" Simon lamented.

"Then came days of orgiastic slaughter. Jews from all over the region, families in carts, women pushing their children in strollers, trains full of Jews, columns of Jews on foot were being dragged into the city, by the hundreds, by the thousands, and were being massacred everywhere, in the streets, in the fields, alive. They were being shot, shot at, I saw a German officer approaching and looking at a pretty thirteen-year-old girl who had just gotten off a train. Mordecai Striegler, a Polish Jew, escapee from various camps and ghettos, was telling the American journalist Meyer Levin about his life and survival one April day in 1945 in Buchenwald.

Nobody knows where it is Boris Cyrulnik and there are only two hours left until, in theory, it offers a masterclass at CosmoCaixa in Barcelona. The renowned neurologist, neuropsychiatrist, and writer—who is about to turn 88—went for a walk after breakfast without picking up his cell phone. Every minute that passes grows uneasy among the EDAI organization, a leading entity in neurodevelopment and child and adolescent mental health, which has invited the author to participate in the fourth edition of the international congress they organize. Cyrulnik has pioneered the use of the term resilience applied to psychology: he himself had to put that capacity to resist and cope with traumatic situations to the test from a very young age. Born in Bordeaux in 1937, the son of a Jewish family originally from Poland, Cyrulnik lost his parents – both deported to the Auschwitz concentration camp – and had to flee from the Nazis and hide for almost three years, until the Second World War ended and his life ceased.