Why Are Some Animals So Muscular?

Описание: Have you ever seen an animal that looks like it's been hitting the gym non-stop? It’s not AI—it’s something called myostatin deficiency. Myostatin is a protein that limits muscle growth, but when an animal is born with a defect in this gene, their muscles just... keep growing. You’ll see cows with massive builds, dogs with bulging muscles, and even mice that look like they’ve been lifting weights. The craziest part? These animals are completely healthy, despite their extreme muscles.