"None. I returned to consciousness and I was lying there with the dome broken wide open and my face bare to the Martian air. I got into my marsuit right away, of course, but that took a few minutes in addition to the time I was unconscious. And I didn't feel restricted by the lack of air. I wasn't even breathing. And I felt that I didn't need to!"
"That is peculiar," she said meditatively. "Tell me, do you know a man named Goat Hennessey?"
"You're the second person who's asked me that recently," said Dark. "I knew him well, many years ago, but I haven't seen him in years. Why do you ask?"
"Because the only case I've heard about of any human being able to live without oxygen in the Martian atmosphere involved some genetic experiments of Goat Hennessey, before the government made him stop them and destroy the creatures he'd been experimenting with."
Dark laughed.
"I can assure you I'm not one of Goat's genetic experiments," he said. "Goat and I were colleagues in this rebel movement twenty-five years ago, before I was hit by a period of amnesia that I've just come out of."
She stared at him.
"A twenty-five year period of amnesia? Impossible! You're not more than twenty-five years old," she said positively.
"If what people tell me is correct, I'm nearer sixty," said Dark. "Terrestrial years, of course."
"Of course. But I don't believe it."