Thoughts on cloning extinct animals

[True Federalist (진정한 연방 주의자)]

The main ethical problem is what would you use as a surrogate mother to bring the clone to term? A secondary problem is we might have difficulty in providing extinct animals with an appropriate microbiome. Another is what about behaviors they would've learned from their parents and/or herd?

[True Federalist (진정한 연방 주의자)]

Can we bring back these guys?

https://en.wikipedia.org/wiki/Northern_white_rhinoceros

Do we even have the genetic material to do it? That's always going to be a concern with attempts to revive a species.