https://www.engadget.com/2017/05/03/...nd-university/

Those high-speed cameras that capture over million or even over a billion frames per second have got nothing on Lund University's creation. The Swedish University's invention can film at a rate equivalent to five trillion images per second -- that's enough to capture anything that happens within 0.2 trillionths of a second. We're talking about events much faster than anything your GoPro can capture, particularly natural processes and reactions in chemistry, physics and biology.
"Today, the only way to visualise such rapid events is to photograph still images of the process. You then have to attempt to repeat identical experiments to provide several still images which can later be edited into a movie. The problem with this approach is that it is highly unlikely that a process will be identical if you repeat the experiment."