Science needlepoint

Microbes

My own design, for Lisa Stein
My own design, for Gemma Reguera

Nature

Okeefenokee swamp, pattern by LubaDaviesAtelier

Cats

"Cuddly Cat" Pattern by Dimensions

Planetary

Geologic maps

Patterns by Kara Prior [more info] [available here]

Biomolecules

E coli 16S ribosomal RNA secondary structure
E coli 23S ribosomal RNA secondary structure