If the fundamental constants of nature differed from their measured values, life as we know it would not have emerged. Stars are witness to the forces of electromagnetism and gravity - displace this equilibrium and the existence of nuclear-burning stars is at risk. In such a universe, stars would never have formed, or might have collapsed to black holes.
Theories of the multiverse suggest that life-containing universes are incredibly rare. We live in one of these, whether by cosmological natural selection or by the consequences of a theory yet to be formulated.
The transcript and downloadable versions of the lecture are available from the Gresham College website: https://www.gresham.ac.uk/lectures-and-events/how-special-is-our-universe
Gresham College has been giving free public lectures since 1597. This tradition continues today with all of our five or so public lectures a week being made available for free download from our website. There are currently over 2,000 lectures free to access or download from the website.
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