Celestial influence (Image: Gerard Fritz / Rex Features) Riding the wave. The Severn bore’s bumper tide is caused by the moon (Image: Jim Nicholls)
is a sight to see. When this moving speed bump of water races round a bend in the UK’s longest river, spouting spray up onto the bank and startling the swans, you can’t quite believe your eyes. It is hard to believe that the moon, a quarter of a million miles away, reaches out with its gravitational fingers to fashion such a localised thing. But the Severn bore is striking evidence, if…
