Any nation willing to send the products of the best minds of a generation and a significant portion of its GNP hurling into space to blast a ball of ice three miles across will be treated very carefully by its neighbours.

ECONOMIST: Stop that comet

Anderson has even treated someone who carefully dismantled grandfather clocks while asleep.

BBC: Sleep: Weird things people do in their sleep

Some worry that there will be unintended consequences, no matter how carefully data are adjusted to account for differences among the patients treated.

ECONOMIST: Doctor, am I going to die? And other important questions