  Loubeyre, Occelli, and Dumas (LOD) [1] claim to have produced metallic
hydrogen (MH) at a pressure of 425 GPa, without the necessary supporting
evidence of an insulator to metal transition. The paper is much ado about
nothing. Most of the results have been reported earlier. Zha, Liu, and Hemley
[2] studied hydrogen at low temperature up to 360 GPa in 2012; they reported
absorption studies up to 0.1eV. Eremets et al [3] studied dense hydrogen up to
480 GPa using standard bevel diamonds. They reported darkening of the sample
and electrical conductivity in which they reported semi-metallic behavior
around 440 GPa. In 2016 Dias, Noked, and Silvera [4] reported hydrogen was
opaque at 420 GPa. In 2017 Dias and Silvera observed atomic metallic hydrogen
at 495 GPa in the temperature range 5.5-83 K [5].
