Only 30% of a coffee bean is soluble in water, and many brewing methods aim to extract significantly less than that. So of ...

If your coffee enthusiasm extends to grinding your own direct from the bean, then [Christian Pederkoff]’s project should hit the mark, he’s created a rather neat 3D-printed coffee grinder.

It sounds like science fiction. Marvel Labs converts disused waste—including seaweed, coffee grounds, and sawdust—and processes it for use in a 3D printing technique called binder jetting.