We're telling you about an armed mutiny in Russia that ended as quickly as it began: what it means for the future of Russia and its war in Ukraine.
Also, a train crash led to extra testing in the Yellowstone River.
Plus, one of the world's largest religious gatherings is underway; Google is launching a new type of search result that pulls from social media; and four people are starting an experiment to see what it's like to lie on Mars.