Turns out wireless networks aren't wireless at all. And light pulses in fiber optic cables carry your voice around the world. A new exhibition explains the science you hold in your hand every day.

A striking decline in teen mental health has coincided with the rise of smartphones and social media. Is social media causing the mental health challenges? Finally, research can answer that question.

Washington Post tech columnist Geoffrey Fowler says a 1998 law prohibits tech companies from collecting data on kids — but only if the companies know the age of their users.

Google and Apple teamed up on using smartphones to track coronavirus infections. But the systems are only available in a few states, where they're being used by a tiny percentage of the population.