Pet cats are a relatively new addition to the Americas. While this part of the world does have plenty of wild cats – from ...

Tortoise shells aren’t just tough armor—they’re living parts of the tortoise’s skeleton, loaded with secrets of survival, ...

How does the urinary system work? The urinary system's function is to filter blood and create urine as a waste by-product. The organs of the urinary system include the kidneys, renal pelvis, ureters, ...