Her name was Henrietta Lacks, but scientists know her as HeLa. She was a poor Southern tobacco farmer, yet her cells--taken without her knowledge--became one of the most important tools in medicine. The first "immortal" human cells grown in culture, they are still alive today, though she has been dead for more than sixty years. HeLa cells were vital for developing the polio vaccine; uncovered secrets of cancer and viruses; helped lead to in vitro...

"Echoing the infamous Milgram experiment from the 1960s, this ABC News program sets up a psychological test in which an authority figure urges men and women to inflict pain. Test administrator and social psychologist Dr. Jerry Burger interprets the disturbing findings. The program also analyzes the 1971 Stanford prison experiment as well as the 2004 hoax in which a McDonald's manager and her fianc�e--directed by a caller impersonating a police officer--...