Scientists from South Africa analyzed the mathematics of neutron stars and found that extreme gravity can create a separate arrow of time moving in the opposite direction.
The research results were published in the European Physical Journal C.
Models showed that epoch functions associated with gravitational collapse gradually decrease, indicating a local decrease in entropy and a possible reverse flow of time.
The researchers mathematically placed an unstable neutron star in a spacetime model and tracked changes in key parameters.
Gravitational entropy favors matter clustering, while classical entropy tends to disperse; extreme gravity can shift the balance between them.