Events

Developments in both cosmology and particle physics suggest that our universe may just be one member of an ensemble of universes, termed the multiverse. However, there are many different versions of the multiverse proposal, so it is important to distinguish between these in assessing the plausibility of the notion. In some versions the values of the physical constants may vary across the ensemble, so this could provide a scientific basis for the suggestion that some of the constants are fine-tuned for the existence of observers. The evidence for this comes from numerous unexplained ‘coincidences’ between the constants, a notion which used to regarded as purely philosophical or even theological.