The fact of understanding who an individual is or what a thing is due to owning viewed or knowledgeable that human being or matter just before: a species that has vanished within the face with the earth [=a species that's now not located any where on the planet] [ + https://www.social-bookmarking.org/en/revolutionizing-identity-verification-comprehensive-solutions-with-face-recognition-liveness-detection-and-more