Space10 mysteries of the universe: How did it all begin? A faint afterglow in the sky tells of a universe that exploded into being 13.8 billion years ago. But we haven't got the full story of the big bang nailed yet Features
SpaceHalf the atoms inside your body came from across the universe Intergalactic winds carry gas and dust from one galaxy to the next, bringing half of the matter in our galaxy from up to a million light years away News