Reindeer chew the cud in their sleep, reveals new research. The study shows that the more time Santa's multi-tasking sleigh pullers spend ruminating, the less time they spend in non-rapid eye ...

Reindeer vary in size but all types are surprisingly small. The largest subspecies of reindeer – the woodland caribou – is about 1.2m at the shoulder, whereas the thickset body and dumpy legs ...

Fans of the show have been shocked to discover just how much of the series is steeped in truth, but there are plenty more ...