The world can be a busy place. Walking down a crowded street, there is a sea of faces in front of you. Look in a shop window, and there is an array of objects for sale. Look up in the sky, and several ...

You often have to make quick judgments about the number of objects you encounter in the world. You might see a group of people walking toward you. It is useful to know whether there are roughly five, ...

An abstract class is a template definition of methods and variables in a specific class, or category of objects. In programming, objects are units of code, and each object is made into a generic class ...

A strange collection of objects found along a major pilgrimage route may have been used in "magical rituals" by sorcerers around 400 years ago, the Israel Antiquities Authority (IAA) has announced.