# Comment on "Zero mass limit of Kerr spacetime is a wormhole"

## TL;DR

This paper critiques a previous study by Gibbons and Volkov, arguing that their conclusions about the Kerr spacetime's zero mass limit are based on misinterpretations of the surface at r=0.

## Contribution

It clarifies the correct geometric interpretation of the r=0 surface in Kerr spacetimes, challenging prior claims about the zero mass limit being a wormhole.

## Key findings

- The surface r=0 in Kerr spacetime is not a wormhole as previously claimed.
- Erroneous interpretation of the r=0 surface led to incorrect conclusions.
- Correct geometric analysis refutes the wormhole interpretation in the zero mass limit.

## Abstract

It is argued that the main results of the paper of Gibbons and Volkov (Phys. Rev. D {\bf 96}, 024053 (2017)) come from erroneous interpretations of the surface $r=0$ in the Kerr and Kerr-(anti)de Sitter spacetimes.