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 ...

The average temperature of the Earth is rising at nearly twice the rate it was 50 years ago. This rapid warming trend cannot be explained by natural cycles alone, scientists have concluded. The only ...

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 ...