The metal-rich universe
The metal-rich universe by Garik Israelian is a 2008 Science & Technology book written by TED speaker Garik Israelian, paired here with the talk they gave.
Metal-rich stars accumulate their metals from previous generations of stars, & contain the history of their galaxy. By studying these stars we can gain valuable insights into how metals change the formation & evolution of stars, & explain the extraordinary massive star populations observed in our own galaxy.
The paired TED talk
How spectroscopy could reveal alien life (2009), the TED talk by Garik Israelian.