Why are puffins vanishing? The hunt for clues goes deep (into their burrows)

GRIMSEY ISLAND, Iceland — Puffins are in trouble. The birds have been in precipitous decline, especially since the 2000s, both in Iceland and across many of their Atlantic habitats. The potential culprits are many: fickle prey, overfishing, pollution. Scientists say that climate change is another underlying factor that is diminishing food supplies and is likely […]