Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more . Summary Antianxiety drug clobazam in waterways alters salmon migration behavior, causing fish to reach oceans sooner and navigate dams faster. Researchers found benzodiazepine-exposed salmon showed reduced fear responses, swimming farther apart even when predators were near. Swedish river studies tracked hundreds of young salmon implanted with time-