  The detection of brown dwarfs in globular star clusters will allow us to
break the degeneracies in age, mass and composition that affect our current
models, and therefore to constrain the physics of their atmospheres and
interiors. Furthermore, detecting brown dwarfs will help us constrain the
properties of the clusters themselves, as they carry information about the
clusters' age and dynamics. Great advancements in this field are to be expected
in the next ten years, thanks to the extraordinary sensitivity in the infrared
of upcoming telescopes like JWST and the ELTs.
