Author: Richard Massey, Professor of extragalactic astrophysics (dark matter and cosmology), Durham University Illustration of the Extremely Large Telescope, currently under construction in Chile’s Atacama desert.ESO, CC BY In recent decades, we’ve learnt huge amounts about the universe and its history. The rapidly developing technology of telescopes – both on Earth and in space – has been a key part of this process, and those that are due to start operating over the next two decades should push...