Research that measures the public mood based on Twitter posts shows that it's currently at its lowest point in a decade. One exception: when people visit parks and green spaces.

Many people who participate in disinformation campaigns are unwitting accomplices and much of the information they spread is accurate, which makes it all the harder to identify the campaigns.

Hackers demonstrated they can take over Twitter's technology infrastructure, a brazen move that hints at how such an attack could destabilize society.

If teenagers organizing on social media can hamper a presidential campaign rally, how challenging is it to manipulate elections?

The likes of Katie Hopkins may be slowly disappearing from social media sites but less extreme and obvious racism is still widespread.

A social media researcher explains how bots and sock puppet accounts manipulate and polarize public debate.

America's news reports and social media chatter open a window into the nation's psyche. An AI-based text analysis of these words shows that the coronavirus is driving up familiar social ills.