Vivian La, Grist Regional Reporter, Michigan/Interlochen Public Radio

Northern Michigan tribes are releasing Arctic grayling for the second year in a row, in hopes of restoring the native freshwater species. Questions remain about how many have already survived and how to adapt to shifting weather from climate change.

The study used more than 40 years of data to map fluctuating PFAS levels across species in the region's food chain.

Using historical temperature records from weather stations around the region, researchers improved their understanding of where ice might have formed and for how long it lasted — spanning the last 120 years.

Scientists in the Midwest are asking for help from the public this winter to measure ice thickness on the Great Lakes and other inland lakes in the region, which they plan to use to improve ice-forecasting models.