Black inventors have done amazing things for our world, even when they have had to overcome enormous systemic barriers. From the start of slavery to t...

When asked to name a Black American inventor, many people might think of George Washington Carver and peanut butter. But this is actually a myth. Ther...

Blood oxygen levels refer to the amount of oxygen circulating in the blood....

What is the difference between a benign tumor and a malignant one? One indicates cancer and the other doesn't. Learn more about their definitions....

Benign tumors are noncancerous growths in the body. Unlike cancerous tumors, they don’t spread (metastasize) to other parts of the body....

Bruising happens when blood vessels under the skin break and spread into surrounding tissue. Learn about causes, diagnosis, and more....

Noticeable bruises as a person ages are related to the tiny blood vessels in the outer layer of skin becoming more fragile. There is not much people c...

Dark spots on the skin are usually harmless and due to hyperpigmentation. This article looks at the symptoms, causes, and treatments for dark spots on...

Yosemite National Park features El Capitan, half dome, Yosemite Falls, and so much more all from within the 7 square mile Yosemite Valley....

¿Tienes mucha tos seca y no se te quita? En ONsalus, te explicamos si puede deberse al coronavirus o a otra afección, además de explicarte cuáles son...