Those who have been following the news recently may have noticed a story that appeared on BBC News about a clutch of mysterious carved heads that have been left on doorsteps in Yorkshire villages.

The Beeb picks up the story:

Despite CCTV film showing a man leaving three heads outside a post office, their origin remains unknown.

So far, 12 have appeared in Goathland and Kilburn, North Yorkshire; four in Arthington, West Yorkshire and three in Braithwell in South Yorkshire.

Each of the heads, which are up to a foot tall, looks different but all feature the same carving - which appears to spell out the word "paradox" - and a note bearing the riddle: "Twinkle twinkle like a star does love blaze less from afar?"

Fortunately for those with short attention spans, those are the only clues that are required. A quick google for "paradox carving" reveals - wait for it - paradox-carving.co.uk, the website of Yorkshire-based sculptor Billy Johnson, whose speciality happens to be stone heads.

And as is customary these days, said googling also reveals a bevy of bloggers deriding the BBC's sleuthing abilities. Good for them.

Mystery solved, I feel.