one of the most critically acclaimed movies of the summer is "the kids are all right," starring annette beninghat's playing out in real life all across america. you found out, didn't you, juju? >> honestly, robin, the numbers made my jaw drop. between 35,000 to 65,000 babies of sperm donors are born every year. it's a growing number of these kids that want to not only meet their donor father, but also their half-brothers and sister. but what happens when one has 10, 20 or 100 children? we went with one to find out. ryan kramer is not your ordinary 17-year-old. he landed a job at nasa. a real-life rocket scientist. but growing up with an incredible intellect wasn't the only thing that made him a little different. >> i was told that i was donor conceived at a very young age. as i got older, i sort of became more curious about that half of my dna. >> reporter: so, with his mom wendy's approval, ryan set off on a mission to find his donor dad. >> i didn't need a father. what i wanted was just to see a picture with him or have a conversation. >> reporter: you weren't looking for a father. you were