Science and Technology Sea Otters Are Being Reintroduced After Urchins Exploded and Devastated Kelp Forests With an Average Decline of 51% Between 2014 and 2020 and Over 95% Disappearance in Some Areas; The Plan Is Controversial, Seems a Last Resort, and Could Redefine Coastal Recovery Maria Heloisa Barbosa Borges 05/01/2026 at 00:38