Tracing our roots back to the Big Bang

I found this interesting article while doing some research for a photo project.

"Go back 6.4 billion years ago, and the Earth didn’t even exist (it coalesced at about 4.6 billion). At 6.4, our ancestors were just dust swirling around in space, fragments of a star that had exploded. Our “local supernova” about 7 billion years ago produced nearly all of the atoms presently in our bodies, cooking the heavier ones out of the hydrogen and helium that had been around for a long time."