Anders Sandberg writes an article for BBC Future. He says:
"Over the centuries, they [forward-thinking scholars] have dreamt of machines to lift the world, transform the surface of the Earth, or even reorganise the Universe. Such 'megascale engineering' – sometimes called macro-engineering – deals with ambitious projects that would reshape the planet or construct objects the size of worlds. What can these megascale dreams of the future tell us about human ingenuity and imagination?"
BBC Future (14/01/2021)