In May 2016 - less than two years ago - Facebook boasted that people spend an average of 50 minutes a day on its apps - Facebook, WhatsApp and Instagram.
The figure was seen as a sign of the internet behemoth's astonishing success, as well as its growing influence over our lives. But two years is a long time, especially in social media land.
On Wednesday night, Facebook's founder Mark Zuckerberg said users are spending in total 50 million hours less a day on Facebook. That works out at a 5pc reduction in time, or two minutes per person.
Facebook framed the decline as a good thing: a result of recently-made changes to the news feed that decrease the number of viral videos users see, and encourage sharing with friends and family.
"The most important driver of our business has never been time spent by itself," Zuckerberg said. "Time in news feed interacting with people is more valuable than...