Much like fingerprint or facial recognition systems, the project uses high-resolution cameras and mathematical pattern-recognition to scan a person's unique iris from up to 40 feet away.

Well, time travel isn’t quite here yet. But wireless charging — the kind that can go through walls and power devices more than 40 feet away — is coming to life at a startup just a few ...

If someone has 20/20 vision, it means they can see the same amount of detail from 20 feet away as the average person. If someone has a visual acuity of 20/40, they can see the same amount of ...