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A second study is investigating Voglibose , which blocks intestinal enzymes that digest carbohydrates . If any of four amino acids can appear in the second position , then the odds are one in 5 of finding one of that group , and the odds of finding the correct amino acids next to each other in the first two positions are one-half times one-fifth , which is one-tenth . The oxygen-rich blood , which appears red , then returns to the left atrium and enters the left ventricle , where it is pumped out to the body once again . Evolution is a scientific theory based on the scientific method , which involves systematic data collection of observable phenomena and scientific experiments that can be accurately replicated . In 2002 , to remember the important difference Dr. Hanley 's work made to so many people , friends and family established the Dan Hanley Memorial Trust , which recognizes courageous and innovative work on the part of individuals or organizations to achieve sustainable improvements for patients .