12 Comedians Who Died Before Their Time. by Patrick Bromley. Updated March 18, 2017. There are comics who work for decades and never produce anything of value, and then there are comics who are brilliant but die tragically before the world really has a chance to see the full extent of what they really could have done.
Your autosomal DNA is a random subset of your mother's and father's DNA (50% from each parent). Two siblings will not have the same results for the same reason that they do not look exactly the same. They do not get the exact same 50% from each parent. Even identical twins don't have exactly the same DNA (only almost exactly the same).
Each of us gets half our DNA from our mother and half from our father. Full siblings have the same mother and the same father, so these siblings get all of their genetic information from the same two people. Half siblings only share DNA from one parent. The genetic information from the other parent is different. If you are testing to determine if you are a full sibling (sharing both parents) or a half sibling (sharing only one parent) it is helpful, but not necessary for an accurate result, to have the mother of one of the alleged siblings submit a DNA sample.