This week on Hidden Brain: coincidences. Why they're not quite as magical as they seem, and the psychological reasons we can't help but search for meaning in them anyway.

Police academy trainees say when a gunman targeted and killed law enforcement officers during a peaceful protest in their city in July, it strengthened their resolve to become officers.

Prisma turns your photos into images that look like paintings and Artisto does the same for videos. Art experts say they are tools for artistic play, but the results aren't art in the purest sense.

More than a million asylum seekers arrived in Germany last year. After three months, they are allowed to work. The CEO of Daimler predicted a new "economic miracle." But it hasn't happened.

The tree in Duesseldorf has gotten more than 5,000 letters and cards. People send it greetings, pour out their hearts, and ask for advice. The project encourages protection of old trees.

The man tried to report a stolen wallet at the airport in Stuttgart, Germany. Officials helpfully put him in the refugee system — which turns out to be hard to get out of.