Why would God put Job through all those hardships just to prove a point to the devil?
Job is one of the most intriguing books in the Bible, and has been analyzed through the eyes of religion, literature and psychology. It's often referred to as the first short story. Your reading is literal; give the book a bit more credit artistically and read it again.
Jesus mother was a virgin when she gave birth, yet science tells us that a woman can get pregnant
First, there are very rare examples in nature of very similar birth events. (If you watch House, he used it in an episode.) Second, the "science tells" part is based on inferential logic not deductive - as are most miracles which violate what "science tells us" (the definition of a miracle BTW). It is very strong evidence, but it is not technically (formal logic) proven true.
He was also lying.