Luke Ellsbury and his 16-year-old daughter had chased the lion for miles through a foot of snow in some of northwest Wyoming’s harshest country. Their bluetick-English coonhounds finally treed the cat ...

Here's what happens: The plankton eat algae that contains the acid, and then the fish eat the plankton, and the sea lions eat the fish — one thing surviving off another, passing on the toxic acid.