Nature is a great architect, and the vascular network – or veins – of a leaf are key to its structure. Mathematical physicists at Rockefeller University use fluorescent dye and time lapse photography ...

Veins are compressible structures that return your blood that lacks oxygen to your heart. In your lower legs, there are several ways your veins can appear atypically — reticular veins are one example.

Varicose veins are bulging, sometimes bluish veins that look like cords running just beneath the surface of your skin. They usually affect the legs, ankles, and feet. Varicose veins that are visibly ...