Use BBC.com or the new BBC App to listen to BBC podcasts, Radio 4 and the World Service outside the UK.
The "many worlds" theory in quantum mechanics suggests that with every decision you make, a new universe springs into existence containing what amounts to a new version of you. Bestselling author and ...
We preselected all newsletters you had before unsubscribing.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results