The Senses

Everyone knows the classic five senses: sight, hearing, touch, taste, and smell. But do we not sense more than that? In fact there are quite a few additional senses we could include. Here are a few:

Temperature - We sense temperature, but it's worth noting that we don't sense the temperature of other things, only the temperature of our own bodies. This is why steel will feel colder than paper even if they are the same temperature. The steel is much more effective at cooling our skin, and our skin temperature is what we actually sense.

Motion - More precisely acceleration. Each ear contains two accelerometers. One measures vertical acceleration and the other, horizontal. They work by feeling with a hair when a weighted membrane is stretched by inertial forces. Note that we cannot detect velocity. Cruising at high speed in a car doesn't really feel different from standing still if the ride is smooth enough. For that matter nor does speeding through space on a planet.

Body Position, Proprioception - If you block your other senses and have someone change the position of your arm, you will be able to at least somewhat detect the change and report the new position. This awareness is achieved thorough sensors in your muscles and joints that report when and how much they are being stretched.