The bruising artillery battle in Ukraine has left a scar that is visible from space

The mass of metal flying each way is phenomenal," says Patrick Hinton, an officer in the British Army's Royal Artillery and a recent visiting fellow at the Royal United Services Institute, a London-based defense think tank. ...The situation harkens back to the world wars of the previous century, Hinton says. And those wars may provide the best hints of what the long-term consequences will be.