I have to assume someone needed to put wood on the fire midway through the night to keep everyone warm and safe. Eliminate that need, and why would you sleep in two shifts?
Fire is only a recent invention globally speaking, we existed for thousands of years without it.
Claims for the earliest definitive evidence of control of fire by a member of Homo range from 1.7 to 2.0 million years ago (Mya). Evidence for the "microscopic traces of wood ash" as controlled use of fire by Homo erectus, beginning roughly 1 million years ago, has wide scholarly support, and that is long enough for humans to adapt imho.
Oh you and your facts, doh…
Did african niggers use fire before White people arrived on the continent? If so, then I guess it's a pretty safe bet to assume that homo erectus did as well, since they're basically the same species.
We came from apes?
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