. >>> teddy forstmann has died. he was worth well north of a billion dollars. he worked hard in his later years to give it away. he bought and sold companies including gulfstream jets, topps baseball cards and dr. pepper. he coined the phrase barbarians at the gate at the dawn of the corporate takeover craze. ted forstmann was never boring. he briefly dated princess diana. his hero was nelson mandela. he adopted two sons from africa. never married himself. he died of brain cancer at the age of 71. >>> while you may know a lot about the research about birth order and how it can affect your life thereafter, there is fascinating new research on birth spacing -- the interval between siblings and how it can affect things like intelligence and test scores. the thinking is the more space between kids can often mean more parental attention, more reading, more supervision, especially among lower income kids and that can mean higher academic achievement. we have linked to the study on our website tonight. that's nbcnightlynews.com. up next here this evening bringing home