We try a special exhibit every year. We have fish here, but we have a lot of other animals, too. We talked about what would be interesting, and lizards came up.

The bacteria gets in their mouth and it sits there. It's nasty. But humans are not on their dinner list.

Their bite can snap a bone.

That's about typical for a male.

If you pick up a starving dog and make him prosperous he will not bite you. This is the principal difference between a dog and man.

These animals have developed the most phenomenal adaptations. They can turn off their reproductive processes at will. They can live on the diet, like the koalas do, of leaves -- which no one else can get any nutriment out of. These are incredible animals.