
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 movement (non-REM) sleep.

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 movement (non-REM) sleep.