Fear may very well be a caveman fear of the predator of the giant lizard chasing them - maybe that's what Steven Spielberg connects with so well in Lost World.

I tried the paleo diet which is the caveman diet - lots of meat. And I tried the calorie restriction diet: The idea is that if you eat very very little - if you're on the verge of starvation you will live a very long time whether or not you want to of course.