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Welcome to Tech News Briefing.

It's Wednesday, November 8th. I'm Julie Chang for the Wall Street Journal.

A former meta-engineer spoke in front of a Senate subcommittee yesterday about executives at the social media giant failing to protect minors on its

platforms.

Instagram knows when a kid spends a significant amount of time looking at harmful content.

Content that they are recommending.

Meta must be held accountable for their recommendations

and for the unwanted sexual advances that Instagram enables.

Our reporter Jeff Horwitz will join us later in the show to tell us more about who this engineer is and what led him to testify on Capitol Hill. But we're starting with some headlines.

The scientific journal Nature has retracted a paper that claimed it had identified a superconductor capable of operating at room temperature.

The blockbuster finding would have paved the way for more efficient energy grids and battery technology.

But our science reporter, Niti Suburaman, says the research raised doubts immediately.

A lot of people were excited about the potential for a room temperature superconductor,

but they had questions about some of the data that was presented in the study that made

them question the results.

For example, one of the charts that was

linked to it and published alongside it.

...