in "the immortal life of henrietta lax," rebecca sloot tells the story of an important scientific discover. in 2017, oprah winfrey produced and starred in a move i have by -- movie by the same name. here's a portion of that interview is. >> scientists had been trying to grow cells for decades, hers just never died. her cells are still alive today growing in laboratories around the world hoe she died in 1951. it became one of the most important things that happened in medicine. they wanted them for space missions to see what would happen to human cells in zero gravity, the years, the sign terrific landmarks just go on and on. >> host: and are till being used today. >> guest: yep. [inaudible] >> basically, they will just keep growing, multiplying and living as long as you keep them fed and clean and the right temperature. they can live on forever. [inaudible] >> guest: this is at a point when scientists were trying to grow any cells they could get their hands on really. to they had been taking samples from anyone who came into the hospital, lots of different hospitals. taken hundreds of samp