# Comment on "Observation of the Wigner-Huntington transition to metallic hydrogen"

## TL;DR

This paper critically examines claims of observing metallic hydrogen at 495 GPa, arguing that the evidence does not support the record pressure or phase transition, and contradicts previous unconfirmed results.

## Contribution

It provides a critical analysis challenging the validity of the original experimental claims regarding metallic hydrogen.

## Key findings

- No supporting data for record pressure claim
- Contradicts previous unconfirmed results
- Questions the evidence for metallic transition

## Abstract

Dias and Silvera (Letters, p. 715, 2017) claim the observation of the Wigner-Huntington transition to metallic hydrogen at 495 GPa. We show that neither the claims of the record pressure or the phase transition to a metallic state are supported by any data and contradict the authors' own unconfirmed previous results.