In 2017 I collaborated  with scientists at Nokia Bell Labs and two Phd students at Trinity College Dublin to use their Schlieren imaging machinery to make the works 6 Litres and Kiss. Schlieren imaging is commonly used in fluid dynamics, as it can show hidden air currents on a television monitor that would usually be invisible to the naked eye. I worked with Nokia Bell Labs to produce videos that showed the body heat and breath coming from two people.  The two Phd students at Trinity College Dublin were using their Schlieren setup to analyse airflow through a pressurised tube. Their system used two spherical mirrors. The focal length of their system was around 60cm