In science news this week: Human actions impact wild salmon’s ability to evolve:  “Once spring-run chinook salmon disappear, they are not likely to re-emerge, indicates genetic analysis of the revered wild fish in a study led by the University of California, Davis. Prompt conservation action could preserve spring-run chinook, as well as their evolutionary potential.  The study, published online today in the journal Proceedings of the National Academy of Sciences, illustrates that when human actions alter the characteristics, or “phenotypes,” … Continue reading SCIENCE NEWS: Human actions impact wild salmon’s ability to evolve; A worm, a parasite, and a salmon; Wildfire ash could trap mercury; Tracking aquifer water with seismic noise; and more …