Law enforcement agencies are particularly aware of how public your body parts actually are. A technology like that ear-scan, which can be used to make shopping easier in one scenario, can be used by the police in another. The FBI has been building a biometric recognition database that it hoped to have filled with 52 million facial images by 2015, with thousands more images added every month. The Department of Homeland Security is working with U.S. Customs and Border Patrol to add iris scans and 170 million foreigner fingerprints to the FBI’s national database.


The search on the left is an older search from before RankBrain was introduced. And the image on the right is a more recent search. There's a big difference between the two: The search on the right seems to have understood what the user has typed, and is showing information that answers the question in a meaningful way rather than just matching for those keywords.