Time travel makes my brain go "eek." This is not a criticism. It's a compliment. Not many things make my brain do back flips and somersaults. Time travel is an impossible concept I cannot understand because it is inherently incomprehensible. Therefore, I love it. One story by Robert Heinlein which I read long decades ago in a compilation … Continue reading Retrocausality: All You Zombies, Robert Heinlein