The ego believes in and creates reincarnation. Distinguishes between life and death, consciousness and super-consciousness, beyond ego these distinctions disappear. There is either something or nothing, when there's nothing time doesn't exist, when there's something it's impermanent. Suppose the earth did have a meteor hit it and human life was extinguished for a couple hundred thousand years, it would be like the blink of an eye in the whole scheme of things.
As for leaving a mark, the harder goal is leaving no trace.