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How do you measure time on a tide locked planet?
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[QUOTE="DaveC426913, post: 6833473, member: 15808"] Yes. [B]IF[/B] you move. But why [I]would[/I] you? On Earth, all species [U]must[/U] contend with widely fluctuating light levels and temperatures [U]because[/U] those are entirely uncontrollable environmental factors - those things [B]will[/B] change daily (or monthly). Earth critter [B]must[/B] have adaptations or they'd starve / get eaten every time the sun goes down/comes up. But on oneFace, why would species bother moving from the ideal habitat they're suited to? Why would those who evolve in the temperate zone [I]bother[/I] venturing into hostile cold/hot territory, especially where [I]other[/I] endemic critters are better suited? They would be at an advantage if they just stayed put (in the same way a Cheetah is best suited to dry arid flats and would lose to tigers if the ventured into the jungle). Now, that is not to say they wouldn't get there [I]eventually[/I], driven by survival pressures - but [I]that change is on the scale of many generations[/I] (as each gen pushes the boundaries of the frontier), [I]not on the scale of individuals[/I]. You might have, say, a species of feloids that have adapted to the night side, and you might have a species of feloids that have adapted to the day side, but [B]there is no environmental pressure[/B] for the [B]same[/B] feloid species to have [B]both[/B] day adaptation [B]and[/B] might adaptations simultaneously. That would be just too expensive. [/QUOTE]
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