All projects in the Antarctic end when funding runs out, or when the Principal Investigator decides that the project is ended.

The cast of Destination Titan - 2011 includes: Yuri Gagarin as himself Ralph Lorenz as Himself - Huygens SSP Co-Investigator John Zarnecki as Himself - Huygens SSP Principal Investigator

Yes, Co-PI should be capitalized as it stands for Co-Principal Investigator, denoting a specific role in a research project.

It was invented by IBM and developed in IBM's DeepQA project by a research team led by principal investigator David Ferrucci see related link

A fire science investigator is a investigator who try to find out why the fire started