This 19 March 2018 video from the USA says about itself:
What a Dinosaur Looks Like Under a Microscope
We traveled to Bozeman, Montana to meet with Dr. Ellen-Thérèse Lamm who explores ancient life by studying it at the cellular level. Kallie and Dr. Lamm discuss how she does this, and what she’s learned by putting dinosaur bones under a microscope. Check out the Museum of the Rockies – Paleohistology Lab website.