A fellow organizer gave [Kieran] a [Harry Potter] Magic Candle ... speeding things up and increasing the wand’s range considerably. Now, the tour guides can light and extinguish the trail ...

By 2021, the NTT team had solved up to 100,000-node ... including quantum computers, light squeezers and broadband optical-communication networks. “I refer to it as a magic wand — you feel ...