Astrobiologists have begun to explore whether life can exist in other universes.
One of the great questions for humanity is whether we are alone in the universe. Indeed, astrobiologists appear tantalizingly close to being able to spot the signs of life on other Earths — should it exist elsewhere — using modern observatories such as the James Webb Space Telescope.
For example, carbon atoms form inside stars by the fusion of three helium nuclei. But the simultaneous collision of three particles seems so improbable that carbon ought to be unlikely to form in any great quantity.In 1954, the astronomer Fred Hoyle reasoned that since there is so much carbon around — life on Earth is made of the stuff—there must be a mechanism that promotes its formation inside stars.
All this leads to the idea of a multiverse — that other universes can exist with fundamental constants that are different from those in our universe. Sandora and co look at the amount of metal produced inside stars compared to other elements; at the Hoyle resonance and how much carbon it might produce in other universes; and at the stability of isotopes to see how long important elements sit around before decaying.
Sandora and co’s work is part of a bigger effort to map the conditions that make Earth-like life possible. They have already looked at the types of stars that allow photosynthesis on suitably positioned planets, how many Earth-like planets might form and so on.
France Dernières Nouvelles, France Actualités
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