Brown dwarfs are sometimes called "failed stars". They are born from interstellar clouds although it is not clear if in a fashion similar to the formation of stars or planets. Brown dwarfs lack the required minimum mass to be able to sustain nuclear reactions in their interiors so they are also known as failed stars and have some properties resembling those of giant planets. Discovering proto-brown dwarfs, i.e., very young brown dwarfs, is key to understanding how nature produces them. A recent study has found the best proto-brown dwarf candidate known to date. Calar Alto has contributed key data to this finding…