the back of beyond

the 14 Bravais lattices the 230 crystallographic space groups the 32 crystallographic point groups the abandoned character the ABC guide the above the absurd the academic year the accused the acme of happiness the acme of perfection the acme of sciences

Pterygospinous foramina pterygospinous muscle pterygostium Pterygota pterygote pterygotemporal pterygotes pterygotus pterygotympanic fissure pteryla