Physics Constants May Set Universal Limits for Life
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A new study proposes that the fundamental constants of physics, which govern the universe, also set strict limits on the viscosity of liquids essential for life. Researchers suggest that even slight changes to these constants could make biological fluids like blood too thick or thin for organisms to function. This work connects the deepest laws of physics directly to the possibility of life itself.
Facts First
- Links fundamental physical constants to the viscosity of liquids essential for biological processes.
- Suggests a change of a few percent in constants like the Planck constant or electron charge could make human blood incompatible with life.
- Builds on earlier findings that established a universal lower limit for how 'runny' liquids can be.
- Proposes that even if stars and heavy elements formed, life might be impossible if liquids could not flow properly inside organisms.
- Follow-up theoretical work is reviewing how liquid motion inside cells may place additional limits on physical constants.
What Happened
Researchers at Queen Mary University of London have published a study proposing a direct link between the fundamental constants of physics and the conditions necessary for life. The research, published in Science Advances in 2023, builds on earlier work by physicist Kostya Trachenko and colleagues that established a universal lower limit for liquid viscosity. The new study investigates whether these physical rules shaping the cosmos determine if cells can function, as processes like nutrient travel, protein folding, and molecular diffusion all rely on viscosity.
Why this Matters to You
This research reframes our understanding of life's place in the universe. It suggests the physical laws you learned in school—governing everything from atoms to galaxies—may also be the precise rules that allow your blood to flow and your cells to operate. If these constants were even slightly different, the biological processes that sustain you might be impossible. This could mean the universe is finely tuned in a way that makes life like ours not just a lucky accident, but a direct consequence of its deepest principles.
What's Next
Theoretical follow-up work is already underway, reviewing how liquid motion inside cells may place additional, specific limits on physical constants. This line of inquiry may lead to a new framework for understanding the prerequisites for life, potentially informing the search for life elsewhere in the universe by defining the physical boundaries within which it must exist.