The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

Human evolution is often told as a tidy story of adaptation, yet some of our most familiar body parts still defy straightforward explanation. From the jut of the human chin to the curve of the outer ...

Health issues in other organ systems, like the kidneys or metabolic system — which includes how the body manages weight and ...

There are a few body parts that remain the same size from the moment we're born until the end of our lives. The human body is an incredible structure of balance, precision, and evolution. While most ...

New research looks into how the retina and vascular system are connected. Retinal blood vessels can act like a window into heart health and overall health, including lifespan and aging markers, a ...