logo

elements

  • Eta Carinae pre supernova

    How the Universe Made the Stuff That Made Us

      When our Universe was in its infancy, the only element it contained was hydrogen, the simplest one—not nearly enough by itself to create interesting things like planets and people. By the time things cooled sufficiently for the single proton in each hydrogen atom to pair with a negatively charged electron, about 92 percent of […]

  • placeholder

    Supernovas & Other Big Bangs: Where Your Body Comes From

    “Some part of our being knows this is where we came from. We long to return. And we can. Because the cosmos is also within us. We’re made of star stuff. We are a way for the cosmos to know itself.” —Carl Sagan, Cosmos That Carl Sagan quote is among one of his most famous sayings, […]