This piece was originally published in Vox and appears here as part of our Climate Desk collaboration.
One morning this week, Hanna Koch was snorkeling in the Florida Keys when she came across a brown beer bottle on the sea floor. Koch, a marine biologist for Florida’s Monroe County, picked up the bottle, planning to carry it with her and later toss it out.
Through her dive mask, Koch peered inside to make sure it was empty.
That’s when she saw an eyeball.

