Quote:
Originally Posted by thrash
It takes a not-inconsiderable amount of work, though, if you're bringing all your timelines up to a consistent present. Most "hey, look at the dinosaurs!" approaches don't ask what they would look like with 66 million additional years of non-catastrophic evolution.
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Don't see why you'd need to bring everything to present: planet of dinosaurs is certainly a trope in things like Planetary Romance about Venus.
Biggest difficulty might be in justifying weird human features in case you really need some green-skinned alien space-babes.