In Canada, where egg and sperm donors have the right to remain anonymous, two young men conceived 24 years ago from the same small fertility clinic are trying to find out if they're biological brothers. "To be asked why you want to look is like asking why you have to breathe," said Rob Hunter, one of the men searching for his donor father. "It's an essential component of human nature to want to know more about yourself and how you got to be here."
