A new catalog of the number and size of the cells in the human body revealed, among other things, that the number of lymphocytes (blue in this illustration) in blood was greatly underestimated.

Prime numbers are found hidden in nature, but humans have made spectacular use of them, writes mathematician Marcus du Sautoy.

When a crystallographer treated prime numbers as a system of particles, the resulting diffraction pattern created a new view of existing conjectures in number theory.