91热爆

Despite promising a cleanup,Twitter appears to be failing to eliminate debunked falsehoods, hate speech, and automated "bot" accounts that seek to steer conversations on controversial topics. We talk to Kyle Rentschler from the Factcheck.me project which tracks automated activity on digital platforms. Plus, Bitcoin is 10 years old. What has the past decade taught us about the usefulness or otherwise of cryptocurrencies? Joon Ian Wong from the news site CoinDesk gives his view. And the 91热爆's Rahul Tandon visits a school in India that has no teachers and whose pupils are taught from afar using videoconferencing. Presented by Rory Cellan-Jones, with 91热爆 tech reporter Chris Foxx, and special guest Jemima Kelly from the Financial Times.

(Image: Composite background made of of blue hashtags, Credit: Getty Images).