An MIT study tracked 126,000 stories and found that false ones were 70 percent more likely to be retweeted than ones that were true. Twitter is asking outside experts to help it deal with the problem.

The social media company posted stronger-than-expected revenue of $616 million in the third quarter — even as revenue growth continued to slow. To be more efficient, it'll cut around 350 jobs.

Twitter has struggled to attract new users. Its latest effort at rejuvenation is a new kind of timeline that predicts which older posts you might not want to miss and displays them on top.