For more than 270 million years, trilobites were among the most successful and diverse creatures on Earth, with over 22,000 ...

BACKGROUND: Massive left ventricular hypertrophy (LVH) is a risk factor for sudden cardiac death in children with hypertrophic cardiomyopathy (HCM), but little is understood about its natural history.

At first glance, a leaf sheep looks a lot like a fictional character. Two cartoonish eyes. Succulent-like leaves branching ...

Sloths—the adorable and lethargic animals living in treetops—depend on the health and survival of Central and South American ...