Image: Wendy MacNaughton and Caroline Paul Once, emoji was just emoji. Now it’s another way for businesses to look into our souls—er, feeds—and see if we might like to buy something. Twitter is rolling out a new feature that lets…

I write for a website called Tech Insider, so every day I’m inundated with emails and pitches for gadgets claiming to make life easier. In recent years, some of these devices have evolved from an easy source of skepticism to…

Volcanic lightning is one of nature’s most epic displays, but what exactly causes the phenomenon is a longstanding mystery. Now, by studying high-speed footage of electrified volcanic outbursts at Mount Sakurajima, scientists have arrived at an answer—and it points to…

I’m not proud of it. As someone who’s at high risk for HIV infection, I have a spotty relationship with safe sex. I came of age in the ’90s, when rappers like Salt-N-Pepa and Lisa "Left Eye" Lopes frequently spit…

While money may not be the key to happiness, it sure can help. A recent study suggests the trick is to be true to yourself. The study, led by Sandra C. Matz at the University of Cambridge, and published in…

GIF Two hours outside of Paris stands Guédelon, a castle that looks like it’s from the medieval period, but is actually being constructed right now. What’s more, the castle isn’t being built with new technology but instead with medieval techniques…

Back in April 2015, foreign exchange company Travelex attempted to change the way Britons spend money abroad with the launch of the Supercard. Operating as a pre-paid Visa card that didn’t need topping up, the prototype allowed a limited number…

Walmart and Amazon both recently changed their price matching policy, and the changes may be a harbinger of things to come in the retail world. Walmart would match a competitor’s price if a shopper showed an ad for the same…