Hybrid embryos made to save the doomed northern white rhino

In Jurassic Park, a little 200-million-year-old blood was all it took to revive rampaging hordes of dinosaurs. In the real world, we’re struggling to save to species that are still living. Biologists are now resorting to desperate measures to bring the northern white rhino back from the brink.

The northern white rhino is one of two subspecies of white rhinos. Around 20,000 southern white rhinos still survive in southern Africa, but their northern cousins in central Africa appear doomed. Those living in the wild have been…