A truly unexpected rainbow. In a rice cooker. Thanks to Dylan for this astounding photograph (click to embiggen)
If you have an unexpected rainbow you wish to share, send it in. Mind you, I'm a rubbish correspondent, as poor Tony Travaglia knows. S0 if I don't reply from anywhere to a week or a month, it's not because I don't like you, it's because I've been distracted/your mail has disappeared in the hundreds of Australian Science Communicators emails/the dog ate my homework. I will reply! eventually, before the heat death of the Universe.