[[Human]]s, like all [[things]] in the universe are in constant motion,[http://www.nap.edu/html/oneuniverse/motion_8-9.html] however, aside from obvious movements of the various external [[body]] parts and locomotion, humans are in motion in a variety of ways which are more difficult to [[perception|perceive]]. Many of these "imperceptible motions" are only perceivable with the help of special tools and careful observation. The larger scales of "imperceptible motions" are difficult for humans to perceive for two reasons: 1) Newton's laws of motion (particularly [[Inertia]]) which prevent humans from feeling motions of a [[mass]] to which they are connected, and 2) the lack of an obvious [[frame of reference]] which would allow [[individual]]s to easily see that they are moving.[http://www.physlink.com/education/askexperts/ae118.cfm]] The smaller scales of these motions are too small for [[human]]s to [[sense]]. | [[Human]]s, like all [[things]] in the universe are in constant motion,[http://www.nap.edu/html/oneuniverse/motion_8-9.html] however, aside from obvious movements of the various external [[body]] parts and locomotion, humans are in motion in a variety of ways which are more difficult to [[perception|perceive]]. Many of these "imperceptible motions" are only perceivable with the help of special tools and careful observation. The larger scales of "imperceptible motions" are difficult for humans to perceive for two reasons: 1) Newton's laws of motion (particularly [[Inertia]]) which prevent humans from feeling motions of a [[mass]] to which they are connected, and 2) the lack of an obvious [[frame of reference]] which would allow [[individual]]s to easily see that they are moving.[http://www.physlink.com/education/askexperts/ae118.cfm]] The smaller scales of these motions are too small for [[human]]s to [[sense]]. |