‘Forever chemicals’ are everywhere. But only a handful have been evaluated for potentially toxic effects. Researchers think there may be a faster, cheaper way to figure out which ones might be hazardous to our health -- using worms.

Experimental drug NU-9 — a small molecule compound approved by the U.S. Food and Drug Administration (FDA) for clinical trials for the treatment of amyotrophic lateral sclerosis (ALS) — improves neuron health in animal models of Alzheimer’s disease, according to a new Northwestern University study.