These sculptures by London-based artist Jonty Hurwitz are so small that are impossible to see with the naked eye. They are smaller than a hair and a bit bigger that a human sperm but, despite their size, the level of detail is just insane. [NSFW for tiny naked women]
Hurwitz's created his sculptures using a new 3D printing technology and a photon absorption technique called Multiphoton Lithography. From his website:
If you illuminate a light-sensitive polymer with Ultra Violet wavelengths, it solidifies wherever it was irradiated in a kind of crude lump. Some of you may have experienced a polymer like this first hand at the dentist when your filling is glued in with a UV light.
He explains the whole process in this video:
Here are some photos of the capture process: