An Alaska seabird species faced the worst mortality event in modern history, and the population isn’t rebounding, a study finds. Experts discuss the future implications.

Millions of other animals may have perished too, suggesting the die-off event might be one of the worst in modern times.

Explore the universe with news on fascinating discoveries, scientific advancements and more. A marine heat wave has killed approximately half of Alaska’s common murre population, marking the ...