The oceans are mostly composed of warm salty water near the surface over cold, less salty water in the ocean depths. These two regions don't mix except in certain special areas, which creates a large ...

Although it can be hard to tell from looking at the often placid waters of the Earth’s oceans, their currents carry immense ...

We look into the body’s circulatory systems. By Sam Sifton I’m the host of The Morning. We’ve long known about two systems in the human body that circulate fluids. A physician in Italy observed the ...

Vascular disease doesn't always cause heart attacks or strokes. Often, it is a quietly evolving disease that shows some subtle signs that are mostly ignorable. In all cases of vague symptoms are ...

Some discoveries change the way we view the human body. In 2021, researchers described what they saw when they had examined skin-biopsy samples that included tattoos: The ink particles had traveled ...

For centuries, scientists believed the human body had two major circulation systems. One was the cardiovascular system that moves blood through arteries and veins. The other was the lymphatic system ...

Deb Hipp is a freelance health and medical writer and editor who lives in Kansas City, Missouri. She is a former investigative reporter with more than 25 years of experience as a journalist and writer ...

Walt Disney Animation Studios’ Zootopia 2 has roared past the $1 billion threshold at the global box office, achieving the massive milestone in just 17 days. This phenomenal pace makes it the ...

Arteries carry oxygenated blood away from your heart. They have thick walls and a muscular layer that keeps your blood moving. Arteries can be as wide as a nickel (about two centimeters). They are the ...

An MCV test can identify conditions like iron deficiency anemia and liver disease. Although rare, an MCV test may lead to complications like infection and nerve damage. It's best to talk with a doctor ...

Deep vein thrombosis (DVT) is a preventable but serious medical condition where blood clots form in your veins. Most often, these clots are in your lower leg, thigh, or pelvis. They can sometimes ...