Privacy is expected when you're staying in a hotel or holiday rental, but sometimes, hidden cameras can be watching your ...

People have found hidden cameras in all kinds of places, but we suggest getting up close and personal to any wall vents. Vents can often hide the signs of an infrared light or reflection unless ...

and tell the distance to objects with an accuracy of 15.6mm – a level of detail 100 times better than what can be seen with the leading spy cameras and telescopes that use lenses.