# Could matter be infinite?

Perpetual motion and Big Bang theory seem to allude that the universe can’t last forever because matter and energy are dispensed.

Is it plausible the Universe has infinite matter?

Disclaimer. I don't know how large the uncertainties on spatial flatness currently are: if Wikipedia is to be trusted $$\Omega = 1.00 \pm 0.02$$ ($$1$$ being flat) based on data from WMAP and Planck.
• Combining the latest results from Planck Collab. (2020) with lensing data and baryonic acoustic oscillation data constrain the curvature to be $\Omega_k = 0.0007 \pm 0.0019$ (where $\Omega_k$ is the deviation of your $\Omega$ from $1$). So yeah, pretty flat. But remember, that's only the observable Universe; we don't really have any idea what goes on beyond that.