METALLIC HYDROGEN: REFLECTANCE, METASTABILITY, AND SUPERCONDUCTIVITY MOLECULAR HYDROGEN WILL BE COMPRESSED TO ULTRA-HIGH PRESSURES IN A DIAMOND ANVIL CELL (DAC). WHEN IT TRANSITIONS TO WHMH IT WILL BE ILLUMINATED WITH LIGHT IN THE VISIBLE AND IR AND THE REFLECTANCE WILL BE DETERMINED USING A SENSITIVE CAMERA. METASTABILITY IS TESTED BY OBSERVING A LOW TEMPERATURE SAMPLE OF WHMH; FIRST THE PRESSURE IS LIFTED AND IF METASTABLE, THEN THE TEMPERATURE IS RAISED UNTIL IT CONVERTS TO THE MOLECULAR FORM. SUPERCONDUCTIVITY WILL BE STUDIED BY OBSERVING THE REFLECTANCE AS A FUNCTION OF TEMPERATURE, EITHER AT A WAVELENGTH CORRESPONDING TO THE GAP ENERGY OR BY TEMPERATURE DEPENDENCE OF REFLECTANCE AT A FIXED WAVELENGTH IN THE INFRARED. THE MEISSNER EFFECT WILL BE STUDIED BY WARMING THE SAMPLE TO TEMPERATURES NEAR TC AND QUENCHING THE SC WITH A HIGH MAGNETIC FIELD. THE GROUND STATE STRUCTURE WILL BE DETERMINED BY XRAY DIFFRACTION AT A SYNCHROTRON FACILITY. FINALLY, WE SHALL STUDY THE POSSIBILITY OF LOWERING THE TRANSITION PRESSURE OF WHMC BY INJECTING ELECTRONS INTO SOLID MOLECULAR HYDROGEN AND COMPRESSING WITH PRESSURE. THE PRODUCTION AND UNDERSTANDING OF THE PROPERTIES OF WHMH WILL HAVE AN ENORMOUS IMPACT ON FUNDAMENTAL, AND PERHAPS APPLIED PHYSICS AS A POSSIBLE METASTABLE ROOM TEMPERATURE SUPERCONDUCTOR; IT WILL ALSO IMPACT THEORETICAL PHYSICS THAT WILL THEN HAVE A TARGET FOR THE RESULTS OF CALCULATIONS.