What is a blue Moon? | Natural History Museum

You may be familiar with the Moon turning red during lunar eclipses, but did you know that it can sometimes appear to have a blue hue? Martin Mangler, a volcano researcher at the Museum, explains what causes a blue moon. Discover more about the Earth’s closest companion: ---------------- The Natural History Museum in London is home to over 80 million specimens, including meteorites, dinosaur bones and a giant squid. Our channel brings the Museum to you - from what goes on behind the scenes to surprising science and stories from our scientists. Subscribe to our channel for the latest films and live broadcasts about the natural world Website: Twitter: Facebook: Instagram: