A bell curve is a graph depicting the normal distribution, which has a shape reminiscent of a bell ... The mean, in turn, refers to the average of all data points in the data set or sequence ...

In the real world, many variables affect the strength and stability of any give shape. The choice of materials, joints, load distribution, and size and thickness of a structure all affect its ...

From small to vast ranges, species diversity grows unevenly. With a shrinking planet and climate change, biodiversity is shaped for years.