Doughnut-shaped swirls of laser light can be used to transmit images newscientist.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from newscientist.com Daily Mail and Mail on Sunday newspapers.
COLLEGE PARK — Maryland Rep. Jamie Raskin’s planned lecture on democracy Thursday at the University of Maryland instead turned into a lively discussion on the Israel-Hamas conflict.