When someone gives blood, the donation is usually separated into components to use for specific needs. But in some cases, a ...

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 ...

Each holiday season, blood supplies tend to drop. A combination of factors — fewer school blood drives, holiday commitments, increased travel, circulation of more illnesses — all contribute to a dip ...