1. Grains of salt under a microscope
The human eye resembles a black hole. This remarkable image captured by Suren Manvelyan highlights the cornea’s depth; behind it is the iris, the colored section that controls the pupil’s size.
Microscopic look at a bee stinger vs. the point of a needle
A cat’s tongue under a microscope looks like it’s made of other smaller tongues

\
This is what a hole in the skin looks like after a needle punctures it, as observed under a scanning electron microscope.
Microscopic image of a tapeworm head
Terrifying photo of an ant’s face
This is shark skin under electron microscope
Kidney stone surface as seen in an electron microscope

Close-up shots of spider eyes captured by Spanish macro photographer Javier Rupérez.
Calcium oxalate crystal (kidney stone) at 8,000x magnification