New Jersey demanded back taxes from the ride-hailing company, claiming it misclassified drivers as independent contractors.

Ethereum, the most popular cryptocurrency platform, completed its much-anticipated switch to a more energy-efficient infrastructure.

Many fans think it will. But it might end up creating some new problems.

The move, which is bound to heighten tensions with Beijing, reflects growing unease about China’s ability to access the personal information that Americans hand over to mobile apps and other services.

The company said on Thursday that it was looking into the scope of the apparent hack.