For those of u who have no idea wat this is about, the asgard (one of the best races in SG-1) had a problem with genetics, in the way that theres has deteriorated from making clones too many times. This would mean they could no longer make clones as the dna is too impure. Their last endevour to fix it caused them to develop a fast paced terminal disease. The asgard called earth said they had a surprise so they went. When they got there thor told them and said they will give earth their knowledge, echnology, and history. Then as they were under attack from ori they blew theere whole planet up. They did not want there technology to wind up in the wrong hands. And as a side note the weapons they installed on the ship let them kik the ori`s ass