First place winner: the hand of a Madagascar giant day gecko embryo, taken at 63x magnification. The hand is three millimeters long.

Second place winner: breast tissue showing cells responsible for human milk production (alveoli) at 40x magnification.

Third place winner: an adult mouse's intestine, showing its blood networks at 10x magnification.

Slime mold shown at 10x magnification.

The extinguished wick of a candle showing particles of carbon being released at 2.5x magnification.

The face of an ant, shown at five times the magnification.

A butterfly egg, seen at 10x magnification.

All the entries!
https://www.nikonsmallworld.com/galleries/2022-photomicrography-competition