Forget hunting for a tape measure or a protractor. Use your Android phone camera and sensors to handle different types of measurements easily.

Three types of looming-selective neurons have been found in the nucleus rotundus of pigeons, each computing a different optical variable related to image expansion of objects approaching on a direct ...

There is a mathematical side to optical illusions. One professor studies them in hopes of creating a safer world. Man on a roof or ladder against the wall: either way, it just doesn't seem possible in ...