Two-dimensional (2D) shapes are completely flat. They cannot be picked up. A polygon is a 2D shape with straight sides that meet at vertices. Polygons have names that show the number of sides they ...

For practical applications, two-dimensional materials such as graphene must at some point connect with the ordinary world of 3D materials. Researchers have come up with a way of imaging what goes on ...

A 2D mammogram is the conventional way to look at breast tissue. The machine takes 2 x-ray pictures of each breast. One is ...

The increased visual realism of 3D films is believed to offer viewers a more vivid and lifelike experience – more thrilling and intense than 2D because it more closely approximates real life. However, ...