But recent evidence suggests it’s not as simple as that. Examination of grave sites indicates that instead of the Mesolithic locals learning how to farm, they were replaced by far more successful Neolithic farmers. One of the differences in the evidence left by the two populations is skull length. The newcomers with their fancy ability to plant seeds and eat what they grew had smaller skulls, and that’s why it’s all but impossible to go into an optician’s shop today and buy a pair of glasses with a temple length of more than 140mm. 

If, like our features editor Andrew, you have a gloriously long skull, you might appreciate this flexible glasses case created by Rorys3D. The maker has made the STL files available on Printables, so if you find that your eyewear doesn’t fit the puny standard sizes offered for today’s humans, you can scale the design in whatever dimension you need to fit longer/wider/deeper frames. 

Other than that, the interesting thing is the flexible flexure. We printed ours on a Bambu Lab Mini using PETG filament. PETG was selected for its improved flexibility compared to PLA, which can be more brittle – making it a more suitable material for a case that may be opened and closed frequently.