THE SCIENCE AND SPIRIT OF GIANTS AND DWARFS� DO PEOPLE OF DRASTICALLY DIFFERENT PROPORTIONS HAVE A LOT IN COMMON? BOB BROWN REPORTS ON "20/20," FRIDAY, JULY 27 ON ABC

Also: Growing Tall� Kids Who Use Human Growth Hormones Despite Possible Side Effects

Why are some people born dwarfs while others grow into giants? "20/20," with resources from the National Geographic Channel, reports on the fascinating science behind giants and dwarfs, as well as the extraordinary spirit that helps them adapt to life. It's a firsthand view of how the world looks from where they stand, and how the world looks at them. ABC News Correspondent Bob Brown's report airs on "20/20," FRIDAY, JULY 27 (10:00-11:00 p.m., ET) on the ABC Television Network.

Working in conjunction with the National Geographic Channel on a special about dwarfs and giants, "20/20" introduces viewers to two very differently anatomically engineered women -- Susie Campbell, a mom who stands three-feet-ten inches tall and lives in a suburb of Baltimore, and Sandy Allen, who is seven-feet-seven-inches and lives in Shelbyville, Indiana. "20/20" brought them together for lunch and an interview to find out things they might have in common, and how they deal with them, including the reactions they get. "A lot of the children would come up and ask me, �Why are you little? What makes you little?' And you know, from then on I would just say, �I am dwarf, God made me this way. I am little just like he made you have brown hair and blue eyes'," says Campbell. Allen tells Brown: "I understand why people do a double-take when they see me. They've probably never seen anyone as big as I am. So I understand that. Some people go out of their way to make jackasses of themselves, if you'll pardon me. And those are the people I learned a long time ago to feel sorry for."

Plus: Are you too short, missing out on opportunities because tall people have an advantage? What if, when you were young, you could have done something about it? Today some doctors are recommending human growth hormones (HGH). Although these treatments, relatively new, can have side effects and the long term risks are unknown, they are becoming popular with some kids to narrow the gap between them and their taller peers, in part to boost not only their height, but their self esteem. The shots are expensive, costing upwards of $30,000 a year. "20/20" follows two teenagers and their parents for two years to see if the years of shots and testing by doctors is really worth it. John Stossel checks back in with them today, two years after the original report aired, to see how they are doing. (OAD Oct. 28, 2005)

Elizabeth Vargas and John Stossel are the anchors of "20/20." David Sloan is the executive producer.