'Dark Energy' reminds us: consensus has no place in real science

So Dark Energy might not exist after all? Good. I'm delighted to hear it. Not that I have anything personal against this mysterious substance which until very recently scientists believed made up three quarters of the universe. (In fact if it does exist, I want some in a jar in my office. It sounds pretty cool).

No, the reason I'm pleased is because it shows the healthy, normal process of science in action.

Dark Energy was invented by cosmologists "to fit Albert Einstein's General Theory of Relati