The tiny vaquita porpoise now numbers less than 10. Can they be saved?

The rare marine mammal is facing an existential threat from fishing nets. Scientists hope they can be saved, but time is running out

The vaquita, the world's tiniest marine mammal, has long teetered on the brink of extinction. The population of porpoises marked with black ringed eyes and smiling, upturned mouths has dwindled by a devastating 99% over the last decade.

Now scientists say their future is more precarious than ever, after a recent survey found less than 10 individuals left in the waters of their limited home range between Baja California and Mexico.