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.
Much of the dark space between stars, as seen in the sky of the image above, is due to the human eye
Thoracic Expansion, Posterior
Lunokhod 1 (lit. moonwalker), the first successful space rover.
Spiral Galaxies (Nearly Face-on Views)
Giant Elliptical Galaxies
Interacting and Colliding Galaxies