A favorite documentary of mine is Encounters at the End of the World, in where, "Film-maker Werner Herzog travels to the McMurdo Station in Antarctica, looking to capture the continent's beauty and investigate the characters living there."
During his time there, he films under-ice divers who risk their lives to explore the depths of antartica's ocean waters to study organisms that are believed to have not evolved for millions (if not billions) of years.
I noticed that the divers, in their routine, were not speaking at all. To me, they were like priests preparing for mass. Under the ice, the divers find themselves in a separate reality, where space and time acquire a strange new dimension.
One of the foremost scholars in the world in his field, Dr. Pawlowski, studies the DNA sequences of foraminifera. What looks esoteric is in fact one of the fundamental questions about life on Earth. In the same way that cosmologists search for the origins of the universe, the scientists here are tracing back the evolution of life to its earliest stages.
While watching this part of the documentary, it always makes me wonder: Which form of live (lineage of organism) has undergone the least evolutionary change? And how exactly is this quantified - just differences in DNA/RNA?