LIVIA ALBECK-RIPKA: ‘In the past five years, the vaquita population — which lives in only a sliver of water between Mexico’s mainland and Baja California — has plummeted by 90 percent. Humans are to blame, but they are not even hunting for the vaquitas themselves. The animals, the world’s smallest porpoises, get tangled and drown … Continue reading Fewer than 30 vaquitas porpoises are left in the wild