The Universe may be getting more disordered overall, but that doesn't stop pockets of order from forming. A new quantum gravity model suggests that as space expands, entropy spreads out, creating local conditions where galaxies, stars, planets, and even life can emerge.
This idea comes from Professor Ginestra Bianconi, a mathematician at Queen Mary University of London. Her work, published in Physical Review D, tackles a long standing puzzle in cosmology: how can the Universe grow more complex while obeying the second law of thermodynamics, which says total entropy must always increase?
Entropy spreads thin as space stretches
Bianconi used a framework called Gravity from Entropy, or GfE, a proposed approach to quantum gravity. Instead of treating gravity as a fundamental force or pure curvature of spacetime, GfE links it to information and entropy at the quantum level, drawing on statistical mechanics.
Her analysis found a key distinction. While the Universe's total entropy rises over time, the amount of entropy per unit of volume actually decreases as the Universe expands. That drop in local entropy density leaves room for organized structures to develop without breaking the second law. In other words, the overall cosmic disorder keeps climbing, but it becomes so diluted that order can arise in smaller regions.
Black holes and the heat of gravity
The connection between gravity and thermodynamics is not new. It traces back to the work of Jacob Bekenstein and Stephen Hawking, who showed that black holes have entropy and temperature. Bianconi's model extends that link to the whole Universe, treating spacetime itself as a thermodynamic system.
Her calculations suggest that the expansion of space, driven by dark energy, plays a central role. As the Universe stretches, entropy gets redistributed across a larger volume. That redistribution may allow complexity to emerge locally, even as the total entropy of the cosmos continues its relentless climb.
Why this matters for understanding life
For people who wonder how a Universe governed by increasing disorder could produce something as intricate as a living cell, Bianconi's work offers a possible answer. The same expansion that seems to push everything apart may also create the conditions for structure and life to form.
The study does not claim to have solved the puzzle. It offers a mathematical framework that aligns cosmic expansion, entropy, and the emergence of complexity in a single model. If confirmed, it would mean that the very force driving the Universe apart also makes room for order, and perhaps for life itself.
