Terry, author of the indispensable Terry's Guide to Mexico, has a name for it – atrabiliousness. The defect of many of the murals, he says, speaking of those in the orphan asylum, is the facial atrabiliousness of some of the subjects. To the observer it minimizes the grandeur of the conception […]

Around the age of four months, the cortex begins to refine the connections needed for depth perception and binocular vision.

The spacing of the desks in the exam hall was intended to prevent candidates from copying each other's work.

Those that pay the piper must command the tune.