(Bloomberg) -- A biotechnology startup working to bring back animals from extinction has raised $200 million at a valuation of $10.2 billion, more than six times its valuation just two years ago.

No, this isn’t a new Jurassic Park plot: A real-life woolly mammoth could be on Earth by the decade’s end. Biotechnology start-up Colossal Biosciences Inc., which is using DNA and genomics in ...