Imagine waiting for incoming passengers at the arrival gate at the airport. Your visual system can easily find faces and identify whether one of them is your friend's. As with other tasks that our ...

IN a recent paper Ruska 1 demonstrated experimentally the possibility of surpassing considerably the resolving power of an ordinary microscope by the use of an electron microscope. This high resolving ...

The index is a statistical measure that determines how uniform the ethnic distribution is for a given area. A region that is closer to zero (green on the map) has a more even distribution of race and ...