As highlighted by the cardboard bicycle, cardboard can be a surprisingly versatile manufacturing material in the right hands. Further proof of this comes via the Kranium: a bicycle helmet constructed ...

Just last month, we told you about the Kranium – a prototype bicycle helmet with a core made from cardboard instead of the usual expanded foam. Well, we obviously weren’t the only ones impressed by it ...

Would you ride a bike while wearing a helmet made of cardboard? What if its design was inspired by nature — specifically, a woodpecker? You'll have a chance to do just that next year — meaning you ...