Archaeology & Mysteries - 5 free documentaries about bodies from the past.
Start with This Is The Best Preserved Ancient Skull We've Ever Found (47 min, Spark), then The Man Who Survived Swimming Icy Oceans (52 min, Wonder). All 5 documentaries here are free to watch from their makers' official uploads. To read deeper, the top-rated book on bodies from the past is The Bog People by Peter Vilhelm Glob.