Most people know their blood type, treat it as a fixed personal fact like ...

Medically reviewed by David Hampton, MD Key Takeaways O- blood is the universal donor type because it can be used for anyone.AB+ blood can receive any type of blood, making it the universal recipient.

Blood – everyone's got it. In fact, an adult who weighs between 150 and 180 pounds has around 1.2 to 1.5 gallons of blood in their body. This makes up approximately 10% of an adult’s weight. Blood ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. There’s more history in your blood types than you think, ...

In an emergency, knowing your blood type could save your life. While this may sound dramatic, it’s true, especially if you have a rare blood type such as AB-negative. If you’ve never given blood or ...

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 ...