The Earth's population will be culled from today's 6.6 billion to as few as 500 million, with most of the survivors living in the far latitudes - Canada, Iceland, Scandinavia, the Arctic Basin.

What we have lived through, the 20th century, has been like a great party. Adults now have had the best time humanity has ever had. Now the party is over and the Earth is reckoning up.

If it hadn't been for the Cold War, neither Russia nor America would have been sending people into space.

I'm a scientist, not a theologian. I don't know if there is a God or not. Religion requires certainty.

The Earth's population will be culled from today's 6.6 billion to as few as 500 million, with most of the survivors living in the far latitudes - Canada, Iceland, Scandinavia, the Arctic Basin.

Only nuclear power can now halt global warming.

Climate change now represents so urgent a threat to mankind that the only way to deal with it is by suspending democracy.