Singer-rapper Rema arrived on stage at Coachella 30 minutes into his 45-minute set in a performance fans deemed a “disaster.” Scheduled to take the Mojave stage from 6:40 - 7:25 p.m. PT ...

SINCE quartz is transparent in the ultra-violet, the employment of the powerful technique for Raman-effect studies developed by Rasetti, in which the 2537 A. radiation from a water-cooled magnet ...