Ludwig Koch was once as influential as David Attenborough is today – a new film by his granddaughter sheds light on a tragic event in the naturalist’s life in Berlin before he fled the Nazis Ludwig Koch was once as influential as David Attenborough is today – a new film by his granddaughter sheds light on a tragic event in the naturalist’s life in Berlin before he fled the Nazis The Guardian’s journalism is independent. We will earn a commission if you buy something through an affiliate link.