How our nasal passages defend against the common cold and help determine how sick we get

When a rhinovirus, the most frequent cause of the common cold, infects the lining of our nasal passages, our cells work ...
Interesting Engineering on MSN

Structures 3D printed inside living human cells that has one-fifth width of a human hair

To demonstrate the method, the team printed a range of tiny shapes, including a 10-micrometer elephant, laboratory logos, ...