Invasive crayfish crisis: Scientists' quest to protect native habitats

ViewIt is not a fair battle: Two scientists on a tiny boat against one of the world's most invasive species.

For the past six years, Loyola University Chicago ecologist Reuben Keller and his students have been waging war against red swamp crayfish — a non-native threat to the environment.

Over the years, Keller's team...