February 6 marks the fifth anniversary of the death of Dr. Li Wenliang, a young ophthalmologist at Wuhan Central Hospital whose attempts to warn colleagues and the public of an emerging ...

This week’s question is about an old 3D scanner, the Eora. Reader Leo asks: “Some years ago I purchased an Eora 3D scanner for use with my iPhone. For a while it worked well, but with a change of ...