There’s a drug sitting in barns across the world that most human doctors have never heard of. It’s used to treat liver flukes in cattle and sheep, and it’s been around for decades. But researchers are now looking at this same drug—closantel—and wondering if it might help us fight one of the biggest threats to human health: antibiotic-resistant bacteria. The Problem Nobody Wants to Talk About Let me be direct: we’re losing the war against superbugs. The World Health Organization projects that antibiotic resistance could cause 10 million deaths every year by 2050. That number is staggering, and it’s not science fiction—it’s a conservative estimate based on current trends. Gram-negative…