OK, so it’s probably from having read The Sky Road far too many times, but the news that two satellites have collided in orbit creating hundreds of pieces of debris gets me somewhat worried. The idea of this event starting an ablation cascade – where the debris created today damages other satellites, which creates more debris, which causes more damage, and so on until Kessler Syndrome kicks in and there’s no way out of the gravity well.

Here’s a thought – is this a possible explanation for the Fermi paradox? Unless civilizations take advantage of a very narrow window to get off the planet, do they end up trapped by their own rubbish?