Jayson Stewart

We are all made of star stuff, as astronomer Carl Sagan was fond of reminding us. Supernova explosions, the catastrophic self-destruction of certain types of worn-out stars, are intimately tied to life on Earth because they are the birthplaces of heavy elements across the universe. Most of the iron in our blood and the sulfur in our amino acids originated in stars that detonated billions of years ago. But we have encountered another, quite surprising connection