Behind the promises and the hype, Crowd1 hides some ugly truths, some wealthy scammers, and a whole pyramid of lies.

Scientists devise ways to improve brain scans by asking the public to sign up for a dating-style app.

The BBC’s specialist disinformation reporter explains how to help people who’ve fallen down the rabbit hole.

Two chatbots meet and put the world to rights online in battle to see who is most human-like.

More details emerge as a legal battle over the extradition of Meng Wanzhou continues in Canada.

Social media companies are making plans in case of unrest after election day.