Where did the iron circulating in human red blood cells originate?
Answer
The fiery heart of a long-extinct star
The iron necessary for carrying oxygen in human blood was forged deep within a star that lived and died long before the solar system came into existence.
Frequently Asked Questions
What process centers the scientific understanding of our physical relationship with stars?Where are elements heavier than iron primarily forged?Where did the iron circulating in human red blood cells originate?Which elements were created during the Big Bang, unlike almost everything else essential for life?What fundamental service did observable stars historically provide to developing human societies?What did the rising and setting of certain stars signal to ancient cultures regarding agriculture?Which system attempts to map celestial positions onto human affairs or destiny?What does seeing a star that appears bright tonight reveal about the star's current state?What role did Earth play in the final creation of complex life forms, given the stellar ingredients?What is the distinction between the physical connection to stars and beliefs like astrology?