Hundreds of Dead Dolphins Wash Up on Peru's Shores

In the latest development in an uncanny trend of mass dolphin and marine mammal deaths, over 400 dead dolphins were discovered on the Pacific beaches of northern Peru last month, the Associated Press reports Tuesday.

Scientists said over 220 were found in the last week of January alone.

Autopsy results were expected in the next two weeks, but suspicions range from “biotoxins in the sea to seismic testing or an unknown ailment,” the AP reports.