The visual system is the part of the central nervous system that is required for visual perception – receiving, processing and interpreting visual information to build a representation of the visual ...

A brief visual target stimulus may be rendered invisible if it is immediately preceded or followed by another stimulus. This class of illusions, known as visual masking, may allow insights into the ...

The heart is a pump, and the blood goes round, and round, and round all the time. And why does it do that? Why can't it just have a rest? Well, the blood has to be kept moving around all the time ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Michael Boyle is an experienced financial professional with more than 10 years working with ...