Carbon dioxide is unusual because it doesn't go through the usual three phases of matter, from solid to liquid to gas, but it goes straight from solid to gas. The volume of the gas is much greater than the volume of the solid. When a solid turns into a gas, we say it sublimes. The process is sublimation.
Robert WinstonI like travelling on my own. It means I'm completely free to think about what's around me.
Robert WinstonI was born with my moustache and, no, I've never been tempted to shave it off. I don't spend a lot of time worrying about my face and, like Gilbert and Sullivan's Katisha, my best feature is my left shoulder-blade.
Robert WinstonYou can now modify the genes of large animals, and the largest animal we are concerned with is the human.
Robert WinstonBy discovering how our minds work, we can improve our learning power and unlock our true potential.
Robert WinstonFollowing 25 children for the TV series 'Child of Our Time' has been extraordinary. The BBC's original plan was to commemorate the new millennium. What better way than to film a number of expectant mums from across the U.K.? Coming from widely different backgrounds, all were due to give birth on January 1, 2000.
Robert Winston