Most of the villagers were hiding in the bush, where they were dying from bad water, malaria and malnutrition

There are other issues I have felt more emotionally connected to, like China, where I lived and worked for some time. I was living there when Tiananmen Square erupted

The trails are a reminder of our insignificance. We come and go, but nature is forever. It puts us in our place, underscoring that we are not lords of the universe but components of it...So when the world seems to be falling apart, when we humans seem to be creating messes everywhere we turn, maybe it's time to rejuvenate in the cathedral of the wilderness - and there, away from humanity, rediscover our own humanity.

If the U.S. wants to help people in tsunami-hit countries like Sri Lanka and Indonesia - not to mention other poor countries in Africa - there's one step that would cost us nothing and would save hundreds of thousands of lives. It would be to allow DDT in malaria-ravaged countries.

It really is quite remarkable that Darfur has become a household name. I am gratified that's the case.

American airstrikes...create risks, especially if our intelligence there is rusty. The crucial step, and the one we should apply diplomatic pressure to try to achieve, is for Maliki to step back and share power with Sunnis while accepting decentralization of government. If Maliki does all that, it may still be possible to save Iraq. Without that, airstrikes would be a further waste in a land in which we've already squandered far, far too much.

The world spends $40 billion a year on pet food.