At least nine. The five we all know about: Sight, hearing, taste, smell and touch, were first proposed by Aristotle, but there are now four more which are agreed among scientists to be official senses, these are:
1. Thermoception – the sense of heat (or it’s absence) on our skin,
2. Equilibriocepti on – our sense of balance, which is determined by the fluid filled cavities in our inner ear.
3. Nociception – Pain.
4. Proprioception – or ‘body awareness’. This is the conscious knowledge of where our body parts are without having to look, for example, close your eyes and waggle your big toe, you still know where it is in relation to the rest of you.
Some neurologists also argue that there are even more than 9. What about hunger? Or thirst? It’s certainly a grey area.