'''Niels Steensen''' or '''Nicolaus Steno''' (1639-86) was a Danish scientist and theologian who is famous for his significant breakthroughs in especially [[anatomy]] and [[geology]]. He was the first to study the human [[heart]] scientifically and to discover that it is a [[muscle]], and he examined the human brain and criticized earlier descriptions of its parts and their functions. | '''Niels Steensen''' or '''Nicolaus Steno''' (1639-86) was a Danish scientist and theologian who is famous for his significant breakthroughs in especially [[anatomy]] and [[geology]]. He was the first to study the human [[heart]] scientifically and to discover that it is a [[muscle]], and he examined the human brain and criticized earlier descriptions of its parts and their functions. |