If not for the heat of a summer day, one of the major biological finds in the Delaware River in recent years might not have occurred.
It was June, and researchers were scouring the banks and shallows of the river between Trenton and Philadelphia for evidence of freshwater mussels, important water-filtering organisms that are becoming increasingly hard to find in the region's streams.
Danielle Kreeger, science director of the nonprofit Partnership for the Delaware Estuary, had spotted shells along the banks during a wetlands project, and she wanted to see if live mussels were in the river nearby.
So far, no luck.
To read the rest of the story, please go to: The Philadelphia Inquirer.