  But now if theoretical investigations reveal nature in present-at-hand time, and if in the switching over from the practical use of equipment to the theoretical investigation of objects, time remains the same Dasein-time, then present-at-hand time is Dasein-dependent too. Given this, it seems that the only way we can give any sense to the idea of nature as it is in itself is to conceive of such nature as being outside of time. Interestingly, in the History of the Concept of Time (a text based on Heidegger's notes for a 1925 lecture course and often thought of as a draft of Being and Time), Heidegger seems to embrace this very option, arguing that nature is within time only when it is encountered in Dasein's world, and concluding that nature as it is in itself is entirely atemporal. It is worth noting the somewhat Kantian implication of this conclusion: if all understanding is grounded in temporality, then the atemporality of nature as it is in itself would mean that, for Heidegger, we cannot understand natural things as they really are in themselves (cf. Dostal 1993).