Jack's head tilts curiously at the mention of a sister. "A sister? A sister you didn't have in your own timeline?"

Jack leans forwards a little, rests his elbows on the table, prepared to hang on Genesis' every word. There's this extra light in his eyes, something that's always present when Jack is talking about something incredible. "I mean, I was very curious about the idea of a life force being tied into your planet. Like I wrote, it's all theoretical. There should be some life force around any planet, but I've never heard it described as an energy that someone could tap into. So, for starters, how would you explain it?"