'Equivalent' covers any prehistoric period with extinct species (either animal or vegetal or both) brought back to life.
Any species extinct/almost extinct (and definitly extinct now) prior to 6000 BC counts.
The park should be at least the size of a football field.
@tftftftftftftftftftftftf Revenue does not matter. The park does not need to be huge, let us say at least the size of a football field.
@MikeTearon OK and would it have to be a for profit park centred around them, or would a zoo, wildlife park, or Ripley's believe it or not having an extinct animal on display count?
And note under the 6000 BC rule, mammoths could be excluded: https://www.cnn.com/2020/02/11/world/woolly-mammoth-mutations-scn/index.html
@Mad It does not matter if it is for profit or not. It would have to be something provable of course. As for mammoths, were not they around for a long time prior to 6000 BC?
@MikeTearon I mean so were Tasmanian tigers and passenger pigeons?
Perhaps the definition should be "from a DNA sample at least 8,000 years old"? That way a passenger pigeon/tasmanian tiger that was (inexplicably) raised from a 10,000yo DNA sample would be OK, but more importantly a mammoth from one of the siberian permafrosts would be too.
@MikeTearon Oh I guess I meant "extinct prior to 6000 BC", I do not know if this what you understood? Otherwise there is going to be some confusion indeed : )
@MikeTearon Point was that some species of mammoth weren't extinct by 6000 BC but I'd imagine that a mammoth would still feel "prehistoric" to many haha
@Mad Definitely : ) I have relaxed the constraint a bit to include 'almost extinct species' as well, I think this should work fine.