Like a cosmic roulette wheel, we exist because of a very lucky combination of factors.
If some of the laws of physics were only infinitesimally different, we would simply not exist. It almost looks like the universe itself was built for life. But how can that be?
Scientists are searching for collisions between different ‘universe bubbles’ in the cosmic microwave background.
The idea that our universe is just one in a 'multiverse' of parallel universes is increasingly gathering attention from cosmologists. But can we ever test the theory?
If there’s a multiverse out there can we see it?
The recent BICEP2 observations – of swirls in the polarisation of the cosmic microwave background – have been proclaimed as many things, from evidence of the Big Bang and gravitational waves to something…