Bill Nye

I work out religiously. It's great for my back. It's great for my core. I've been exposed to lots of exercise regimens and movement classes as an actor, so I understand the importance of stretching and staying limber, but Pilates is what's really spoken to me. It works everything out.

Throughout his remarkable business and government career, Robert Rubin, now 65, has both worked exhaustively at reaching well-founded conclusions and rejected the idea that anything - and he means anything - can be a 'provable certainty.'