There he and Marvin L. Cohen extended PP theory to calculate the fundamental optical and photoemission spectra of many semiconductors, with high precision.
[8] In 2020 Philips contributed a manuscript to the Proceedings of the National Academy of Sciences concluding that the evolution of human Dynein shows features "indicative of intelligent design".
[9] An accompanying letter did not support this controversial conclusion: "Invoking intelligent design in an attempt to buttress unjustified generalizations on evolution is non sequitur writ large".
[11] Finally, in late 2022 he identified a qualitative change in the set of spike mutations from becoming more level to being concentrated near a few sites in the Receptor Binding Domain.
One of his highlights not mentioned above is his (1994) bifurcated solution to the fractions found in stretched exponential relaxation, the oldest (~ 140 years) unsolved problem in science.