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 ...
Do you have a medical question you'd like to get a doctor's honest answer to? Dr. Mara Gordon, a family physician in Camden, N.J., answers reader health questions monthly. Write us at: [email protected].
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