Did you know?
Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
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.
Three of the color variants found at Fossil Rim Wildlife Center in Texas
The insect family Coenagrionidae is found in the order Odonata and the suborder Zygoptera.
Several species of squirrels have melanistic phases. In large parts of United States and Canada, the
False-color imagery of the Sun, a G-type main-sequence star, the closest to Earth.
Statistics Canada, Labour Force Survey
Ribonucleotides containing unusual nitrogenous bases are found in transfer RNA