This means that Eratosthenes estimated the circumference of the Earth to be about 40,000 km. He also knew that the circumference of a circle was equal to 2 times Ï (3.1415...) times the radius of the circle. (C = 2Ïr) With this information, Eratosthenes inferred that the Earth's radius was 6366 km.
Ankylosing spondylitis is a form of chronic inflammation of the spine and the sacroiliac joints. The sacroiliac joints are located at the base of the low back where the sacrum (the bone directly above the tailbone) meets the iliac bones (bones on either side of the upper buttocks) of the pelvis.
Ankylosing spondylitis is one of the rheumatic disease, which is a chronic, inflammatory that causes arthritis of the spine and sacroiliac joint-the joint at the base of the spine where the spinal column joins the pelvis.Ankylosis means the fusion of verterae to each other.he extracts of these herbs are more effective in reducing the pain and inflammation of all types of arthritis and joint pains. Our product Joint aid plus contains herbal extracts of such herbs which are useful in painful joint conditions. Constipation must be avoided at all costs in Ankylosing spondylitis.