Why do your fingers leave prints when you touch something

Natural oil on your fingers.

Explanation:

On your fingers and around your body, there is a natural oil on the surface of your finger tips, so that when you touch something, they leave prints. When you sweat, natural oil is left on your skin.

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .