If only I could figure out what was making their life signs fade.

"Not of the quality we would need to find her specific life sign."

No life signs, may have been an automatic defense system.

I can say we're not picking up any life signs yet.

All we have to do is scan them for life signs.

"I know this is a long shot, but are there any life signs?"

"These life signs may be the very scientists you seek."

"No life signs except what there was supposed to be."

No life signs at all in there, by the way, sir.

Good; that one life sign is of great interest to me.