Now with LeRoi Moore gone, a piece of the puzzle is missing.

VOA: special.2009.08.28

It's a total mystery,". He says brain studies are shedding light on the pieces of the puzzle and might one day solve the mystery.

VOA: standard.2010.01.15

"And that's what this method does - it captures the complexity of the puzzle and the interaction of all these genes together to produce exceptional longevity."

VOA: standard.2010.07.14

Like a jigsaw puzzle, each medal is a piece of the master design.

VOA: standard.2010.02.16

"It was like a giant jigsaw puzzle and the more we started to unearth and peel back the onion of who this guy was and what happened to him in the past and trying to truly understand the reason why he would be so obsessed with a specific case once we start to uncover these things about him we realized that once we explain one set of circumstances we needed to go even further with another set of circumstances."

VOA: standard.2010.02.27