O'Donnell didn't bother to understand. He turned to the operator.
"Turn it," he said.
They all hovered over the radar screen, waiting.
The food turned out of the leech's path and streaked away. Ahead was a tremendous source, but still a long way off. The leech hesitated.
Its cells, recklessly expending energy, shouted for a decision. The food slowed, tantalizingly near.
The closer source or the greater?
The leech's body wanted food now.
It started after it, away from the Sun.
The Sun would come next.