Motion detection is the ability of the visual system to detect motion in the visual field. Motion detection in its simplest form takes place in the retina, but more complex processes related to ...

There's an addictive quality to a government game that's unlike the rush you get from shooters or RPGs, although the escapism is no less real. Whether you're setting economic and trade policies, ...

Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as energy, mass, particles and waves. Physics attempts ...