"For me it was completely by accident," Martha said. "I'd have to do it a few more times to see if there's a pattern." Though correlation didn't always imply causation, of course, of course--it was still a fairly good indicator in the real world outside science.

"A lot of animals?" she echoed, brow furrowing in thought. "That's a little weird, unless you needed to commune with nature or something and this place was giving you what you needed..."