To fish the oceans sustainably, nations must reduce bycatch, or accidental catches. But fishermen often resist changing gear or techniques that kill nontargeted species.

Whales eat more tiny specks of plastic than previously thought. And nearly all of it comes from the animals they eat, not the water they gulp.

The Soviet Union was a latecomer to industrial whaling, but it slaughtered whales by the thousands once it started and radically under-reported its take to international monitors.