An extinct animal zoo? How so?! Imagine visit a zoo full of animals already extinct, from dinosaur to mammoths. For the most people, this scenario is a dystopian nightmare. To others, however, it generates much excitement. (much or a lot of?) But, as science advances, it may become reality soon. Some researchers, for example, are already analyzing how cloning of animals could change the tourism industry at 2070. (in or at 2070?) A dinosaur park, on the other hand, still remains a fantasy. The De-extinction remains a challenge and it is unclear whether the dinosaur DNA could be recovered. With current technology, samples of DNA (or DNA samples?) only can be used for 1 million years - In this connection, theoretically we could clone a Neanderthal man, but not a triceratops who lived 65 million years ago. This is an excerpt from this post: https://g1.globo.com/ciencia-e-saude/noticia/a-possibilidade-cada-vez-mais-real-de-termos-zoologicos-de-animais-extintos.ghtml