A jury in LA has delivered a damning verdict for two of the world's most popular digital platforms, Instagram and YouTube.
It ruled those apps are addictive, and deliberately engineered that way – and that its owners have been negligent in their safeguarding of the children who have used them.
It's a sombre moment for Silicon Valley and the implications are global.
The tech giants in this case, Meta and Google, must now pay $6m (£4.5m) in damages to a young woman known as Kaley, the victim at the centre of this case.
She claimed the platforms left her with body dysmorphia, depression and suicidal thoughts.
