I wouldn't be here today if it were not for the NHS. I have received a large amount of high-quality treatment without which I would not have survived.

Life would be tragic if it weren't funny.

Only black holes of very low mass would emit a significant amount of radiation.

Some forms of motor neuron disease are genetically linked, but I have no indication that my kind is. No other member of my family has had it. But I would be in favour of abortion if there was a high risk.

I would like nuclear fusion to become a practical power source. It would provide an inexhaustible supply of energy, without pollution or global warming.

If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans.