article_snippet.sent: Scroll down for video .
article_snippet.sent: It was filmed by Paul Shearing  from University College London and the findings are published in the journal Nature Communications.
article_snippet.sent: Dr Shearing and his colleagues then used thermal imaging and non-invasive high speed imaging techniques to observe the internal structure of each.
highlights_snippet.sent: Researchers  used thermal imaging to see what happened inside each cell .
  