SpaceEarth may have grown around a rock from an alien star system Interstellar objects like ‘Oumuamua might pass through our solar system in such high numbers that one could have acted as a seed around which Earth grew 51¶¯Âþ
VideoTim Peake: The future of humans in space Tim Peake expects humans to be exploring the moon and within decades, the first humans will arrive at Mars. Video