NASA's Hubble Space Telescope got a rare look at the aftermath of two cosmic collisions — and helped scientists solve a decades-old mystery. Many years ago, scientists saw a dense, bright spot near a young star called Fomalhaut. Scientists had stumbled on the dusty debris from two cosmic crashes.

Conspiracy thinking, supernatural beliefs and pseudoscience can seem impervious to evidence. An anthropologist suggests the opposite: Extraordinary beliefs may be supported by an individual’s experience.

The number of international travelers flocking to Spain is on the rise. What future restrictions will be in place? And how can you be a good tourist in Spain?