Fudging the data in any way whatsoever is quite literally a sin against the holy ghost of science. I'm not religious, but I put it that way because I feel so strongly. It's the one thing you do not ever do. You've got to have standards.

There aren't just bad people that commit genocide; we are all capable of it. It's our evolutionary history.

There is little evidence that our individual intelligence has improved through recorded history.

We'd never have got a chance to go outside and look at the earth if it hadn't been for space exploration and NASA.

NASA will send up a big sun shade that will be in orbit between the earth and sun and deflect 2 or 3 percent of the sunshine back into space. It would be cheaper than the international space station.

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

If we gave up eating beef we would have roughly 20 to 30 times more land for food than we have now.

China will soon emit more greenhouse gases than America, but its regime knows if it caps aspirations there will be a revolution.