With a certain medieval-themed sequel on its way this year, finding the best Doom merch is abruptly top ... or figures you can 3D-print at home. Besides being an excellent set of collectibles ...

Developed by researchers at the Universities of Gothenburg and Isfahan, the 3D printed helmet can better absorb shocks than traditional foam-lined helmets by deforming its shape as required.

The goal here wasn’t to create a hockey helmet that never goes flat, but one with cushioning inserts sized and shaped to perfectly contour to a specific user’s head. Before 3D printing ...