http://www.sciencemag.org/news/2020/12/protein-found-fingertip-capsules-may-be-critical-our-sense-touch

Running your hand across any surface causes vibrations that signal your sense of touch.

Can you tell the difference between high – and low –thread-count sheets just by touching them? Thank usherin, a protein found in a mysterious structure in your fingertips. Usherin also helps us see and hear, suggesting a deep molecular connection among our most important senses.