Poppa Neutrino has been a vagabond his whole life. His existence is far outside the boundaries of what most of us consider normal. Acclaimed New Yorker contributor Alec Wilkinson explores his most charming subject yet in the person of this eccentric hero.Poppa Neutrino has been a vagabond his whole life. His existence is far outside the boundaries of what most of us consider normal. Acclaimed New Yorker contributor Alec Wilkinson explores his most charming subject yet in the person of this eccentric hero.