Do all living creatures have to face death?

Man of the past had generally had the opinion that all living creatures must, sooner or later, die. Such an opinion had stemmed from the fact that in those days the microscope had not been invented yet, which had led him to think that nothing else, apart from what he could see with his bare eyes, could possibly have been in existence. Thus, the living creatures he meant were confined to only the ones visible to his bare eyes. Basically, those creatures the early man had been referring to were creatures that