Imagine arriving at an airport, dropping your bag on a conveyor belt, and walking to your gate without any lines or other check-in formalities. Your face is your ticket and your passport. It's all you need. That day is approaching. Already, face recognition is being tested at dozens of airports around the world to conduct security checks faster and more accurately than humans can. In 15 U.S. airports, face recognition is being used to finally comply with laws passed as long as two decades ago.

Talk about a man cave. Lolo Mauron, a 92-year-old bachelor, has filled his den in the south of France with vintage cars and tools. And his digs are literally that: caves carved by the Romans into the limestone hills outside the town of Saint-Rémy-de-Provence.