I've always been more interested in organisms that can move on their own than in stationary plants. But when I canoe or hike along the edge of lakes or oceans and see trees that seem to be growing out of rock faces, I am blown away. How do they do it?

The failure of world leaders to act on the critical issue of global warming is often blamed on economic considerations.

The future doesn't exist. The only thing that exists is now and our memory of what happened in the past. But because we invented the idea of a future, we're the only animal that realized we can affect the future by what we do today.

If America wants to retain its position as a global power, its president must listen to the people and show strong leadership at this turning point in human history.

I live in Dublin, God knows why. There are greatly more congenial places I could have settled in - Italy, France, Manhattan - but I like the climate here, and Irish light seems to be essential for me and for my writing.

I knew that Britain and the United States were beacons of freedom and democracy at a time when my life - and Western civilisation itself - was at grave risk.

When the people gave them the mandate to govern in 2008, these UDP leaders had one thing in mind: They run things. They forgot all their lofty promises to the people. They set out to crush the PUP and to erase all the accomplishments of the PUP years in government.

U.S. assistance provides the Jordanian government needed flexibility to pursue policies that are of critical importance to U.S. national security and to foreign policy objectives in the Middle East.