17 of the most epic sibling rivalries of all time
AP Photo/Jack SmithTwins and world class skiers Phil and Steve Mahre, 1984Since the days of Cain and Abel, sibling rivalries have dotted history.
Some brothers and sisters wage bitter fights over money and power, while others are purely playful, competitive one-upsmanship.
These 17 sibling rivalries prove that it's impossible to expect brothers and sisters to get along all the time. And some just simply have it out for one another.