TechnologyLiquid crystal lenses could make better bifocal glasses A prototype of bifocal eyeglasses uses liquid crystals and electric fields to switch between modes that aid in nearby and distance vision News
TechnologySocial media is dead 鈥 here鈥檚 what comes next A new information ecosystem is on the rise, featuring closer connections, cosy media and worker-owned websites, writes Annalee Newitz Comment