I believe a woman could deserve to be on the $20 bill, but I just don't see why the $20 has any significance in the matter. Just like anyone, regardless of gender, if she did a deed worthy of that much recognition, she should get her own bill instead of demoting Andrew Jackson.

All human life relies, in one way or another, on animal life. Though the absense of some species would have a smaller affect on the human race than the absense of others, all species affect us indirectly.

Either way, importance is relative.

Humans raise thousands of unsustainable animals, deplinish soil fertility, destroy the ozone layer, and genetically alter and over populate species. But even through all this stupidity, waste, and pollution, the fact still stands that the human race has the ability to survive and adapt. Even if some kind of incredible bomb went off, I still think the human race, that is, those who somehow survived, would make it. Adaptation is human nature.