and it made dorothy gibson, in effect, a superstar. the bad part about her story is that the studio burned down and the only known copy of her film was lost forever. so all we have remaining are publicity shots from the film. it's a great shame because she was on the titanic, and the way things were represented in the film would probably have contained details that are lost forever now. [audio logo] descending into the very deepest points of the ocean is extraordinary because within a thousand meters, you basically lose all light. it is like staring truly into the abyss. what is fun to do is you can flash the lights of the submarine at high intensity, and when you turn them off, all the life that's in the ocean that has bioluminescence, they see the light of the submersible, and it's like having creatures in a confused way trying to talk back to you. it's very cool to see that. it's a totally alien way of trying to communicate. so it's a very peaceful journey all the way down. and it can take about 2.5 hours to go down to 4,000 meters