On this timescale, civilizations might have been popping into existence since the late spring months, and there seems to be no compelling reason why the first ETC couldn’t have arisen by about May Day. So although the first species with the inclination and ability to engage in interstellar travel might have arisen at any time in the 8 months between May and December, according to Hart the temporal explanation asks us to accept that this species started traveling no earlier than 11:21 PM on 31 December. It would be a remarkable coincidence if our civilization emerged so soon after the
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Wow
