What 100 years of studying other galaxies has told us about the cosmos A hundred years since Edwin Hubble announced his discovery that ours is not the only galaxy, we are still awestruck by the scale and structure of our universe – and there are many mysteries still left to solve Leader
EnvironmentLet's not trash recycling technologies that could end plastic waste Some environmental campaigners claim that attempts to create a circular economy for plastics are doomed to fail – but the arguments can be disingenuous Leader