In Star Wars, 'force lightning' is a lethal weapon that can only be tackled with a lightsaber. But would it work in real life?
Warning: you'll never watch a lightsaber duel in the same way again after you read this ...
Four decades later, I find myself surveying 13 billion years of cosmic history and mapping events that really did happen a long time ago in galaxies far, far away.
It's not easy – but we are moving in the right direction.