AACC , a global scientific and medical professional organization dedicated to clinical laboratory science and its application to healthcare, launched Lab Tests Online in 2001 so that patients and caregivers can learn about the many tests that are a vital part of medical care. The website also recognizes the contributions of the laboratory professional and other essential members of the healthcare team, such as physicians, nurses, and physician assistants. Get quick access to 340+ clinical test articles vetted by experts in the field and other resources that you as a professional may find beneficial.
Once thought to be signs from the heavens of future events, comets now are understood to be relatively simple astronomical phenomena. Comets are celestial bodies of small mass (1) mainly of gases. They consist of a nucleus of ice and other similar (2) materials, followed by an extensive tail. The tail is formed (3) the comet approaches the sun, as particles from the edges of the nucleus are (4) off. Comets have traditionally been regarded as (5) of both good fortune and imminent (6) . People have often pondered the nature of the events that these celestial bodies have been (7) to bring. In 1066 AD, a comet appeared, which greatly concerned King Harold of England. He was (8) towards an armed conflict with William of Normandy. His men wondered (9) this comet was a sign of victory or defeat. The Normans answered this question on Saturday, October 14, 1066. Late that afternoon, after a fierce battle at Hastings, King Harold (10) dead among many hundreds of his soldiers. William had all but conquered England and changed the course of world history.