We are all made of stars: half our bodies' atoms 'formed beyond the Milky Way' https://t.co/0lPMhzxGBc
— The Guardian (@guardian) July 27, 2017
0Powerful supernova explosions can fling trillions of tonnes of atoms into space with such ferocity that they escape their home galaxy’s gravitational pull and fall towards larger neighbours in enormous clouds that travel at hundreds of kilometres per second.