A trial kicking off this week in Los Angeles will weigh one of the most fraught questions of the digital age: whether social media giants are responsible for harming children.

Three of the world's biggest tech companies face a landmark trial in Los Angeles starting this week over claims that their platforms — Meta's Instagram, ByteDance's TikTok and Google's YouTube — delib...

The case involves a 19-year-old from California, identified as K.G.M., who said she became addicted to social media platforms at a young age because of their attention-grabbing design, according to co...