"Some studies place the time horizon of nonhuman animals at just a few minutes; others allow that in some contexts, some animals might prospect as far as day (Roberts, 2002). Humans, in contrast, can readily mentally represent events and episodes that are days, years, decades, and indeed millennia in the future, long after they as individuals, or even as a species, will have perished. The time horizon of humans appears to be essentially boundless."

Homo Prospectus, Seligman et al.