I watched the TED talk on de-extinction. Sequence the genome. Find the closest relatives. If possible, use their cells and turn into stem cells, modify into the stem cells of the extinct species, turn into germ cells. Put germ cells in the animals to make little extinct animals and brood them. In the case of the lecture, chickens and roosters would have the engineered germ cells for passenger pigeons and other fowl. They lay eggs and hatch them. Then give to the nearest relative in terms of behavior to train them to feed and flock. Now the species is “de-extinct”.
It was funny watching an environmentalist Earth worshiper say this was bad because it was interfering with nature. The scientist retorted that we’ve already interfered with nature by rendering these species extinct, and we’re actually undoing the damage by bringing back these keystone species.
IE, the de-extinction isn’t against nature but what environmentalists should support to restore it.
Environmentalists are flat earthers/