Did you know?
Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.
Did you know?
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
Mutant sites in the PKU gene
Illustration showing how the primary breast tumor metastasized through the lymphatic and blood vesse
Primates use their space in a variety of ways: home ranges, core areas, and territories.
This frame from a home video shows Eric Harris (on the left) and Dylan Klebold (on the right) as ...
Leading Sites of New Cases of Cancer in the United States, 2013
Ribosome structure and tRNA-binding sites interpreted from cryo-EM–generated data