Zeros to heroes: 11 unlikely ideas that changed the world
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Issue 2777
H5N1's jump to pigs brings the virus a step closer to a human pandemic
Can M-theory explain the birth of our universe? Stephen Hawking thinks so, but without empirical evidence it's just a matter of faith
From imaginary numbers to gyroscopic monorails, we pick out some of the most improbable ideas to have hit the big time