Has Twitter just had its saddest fortnight ever?

A new tool traces the “moods of twitter,” but emotion is only one measure of the current situation, Desmond Patton says.

It’s one thing to tell the world ‘this is the saddest week’,” he says. “But also in the saddest week, you have thousands and thousands of people who are now activated and moving towards equality and social justice.”

Read more in Nature