https://www.livescience.com/animals/extinct-species/closer-than-people-think-woolly-mammoth-de-extinction-is-nearing-reality-and-we-have-no-idea-what-happens-next

Scientists say they're close to resurrecting the woolly mammoth. The plans involve inserting genes for iconic woolly mammoth traits, like shaggy coats and curly tusks, into the genome of an elephant, and growing the creature in an elephant surrogate

For about seven minutes in 2003, scientists reversed extinction.

The resurrected lineage was the Pyrenean ibex (Capra pyrenaica pyrenaica), and the last known member of the subspecies, a female named Celia, had died three years earlier.

Scientists had collected DNA from Celia's ear before her death and injected her genetic material into a domesticated goat egg cell with its nucleus removed. The resulting clone — the first and only extinct creature to have been revived at the time — died soon after birth due to a lung defect.

Although that effort failed to produce a healthy animal, "de-extinction" science has advanced dramatically in the past two decades. Technology is no longer a significant hurdle to reviving recently extinct species, and in many cases, we have enough DNA to piece together functional genomes for cloning. The question isn't so much whether we can resurrect lost species but if we should.