surprising source

Rabbits may have a surprising source of calcium — eating their own teeth. Rabbits' teeth grow continuously, and bunnies wear them down by munching fiber-rich foods. Scientists suggest rabbits recycle a fine powder resulting from this constant grinding to fuel tooth growth.

Heart Mystery Solved: Scientists Uncover Surprising Source of Cardiac Inflammation

The Surprising Source of Radiation Coming From Black Holes

A Surprising Source of Oxygen in the Deep Sea

Hubble Telescope finds surprising source of brightest fast radio burst ever