This Simple Structure Unites All Human Languages - Issue 76: Language

As you breathe in, your lungs fill with air. The air is carried through every part of your lungs by tubes. These tubes are organized in a particular way. The tubes fill our lungs by branching, branching, and branching again, into tinier and tinier tubes. Each branching point is similar to the previous one. Your breath, your very life, depends on this structure.