Blood may seem like it’s all the same, just a red liquid. But if you look at a drop of your own blood under a microscope, you would see objects floating in it that look like balls and doughnuts. If ...

Most people don’t spare a thought for their blood type unless they’re in need of a transfusion — but could yours hold secrets to your health? There are four main blood types: A, B, AB and O.

Oct. 25—Blood courses through your body with every heartbeat. It carries life-giving oxygen to every organ. Blood also helps remove the waste products your body makes. Because it flows to and from ...

Medical emergencies strike without warning. Whether it’s a car accident, severe allergic reaction, or unexpected surgery, having family and friends who know your blood type can significantly impact ...

Just like we inherit the color of our eyes and the shape of our nose, we pass on to our children our own blood history. The most common factors, or types, are A, B, O and D. We pass on to a baby both ...

Across life on Earth, blood comes in blue, green, purple, even clear. But why? And what makes your blood different from mine? This is the strange world of blood—what it does, why it varies, and why we ...

Our genetic characteristics can range from our eye color to, in the case of men, being born with a recessive allele which means we get to keep our hair for much longer than those without it. Genetics ...