"Is this a liver?" Lucas asked Kristin, poking at a liver in a petri dish.
"Yes, it's a shark's liver," Kristin answered him. "Sharks don't get cancer, so we hope by studying their DNA we can find a cure for cancer in humans. And don't touch that. You'll contaminate it."
"Sorry," he said, removing his finger from the liver. He continued peering at it. Doctor Westphalen grabbed it, and started chopping it up to extract the DNA. Then she took a lump of something and told Lucas, "this is liver cancer. We're trying to find out why our shark friend over here can't get it. So we'll expose it to the shark's DNA and see if it shrinks."
"I think I prefer living animals," Lucas said with a blanched look on his face.
"Yes, yes, go to your dolphin," Kristin laughed.
Lucas walked the ten feet between Kristin's station, and the nearest open water aboard the sub. "Darwin?" he called.
"Lucas Play," came the answer.
"Yes, Lucas play." Lucas got in the water with Darwin and brought a basketball, attaching a basketball net to the edge of the pool. They splashed and played basketball until Kristin called him again. "Lucas, come look at this." He got out of the water and headed over to the microscope. "It looks like you chopped the cancer up," he said.
"Yes, but I didn't. The shark's liver did that."
"Doc, are you saying you've come up with a cure to cancer?"
"I wouldn't go that far this quickly, but, it looks promising.