Reindeer Can Sleep While Eating, Study Finds

This multitasking ability could help reindeer maximize rest during the summer months, with sleep patterns regulated internally rather than by environmental conditions.

Reindeer are able to sleep and chew cud simultaneously, according to a new study by researchers from Norway and Switzerland.
The brain waves seen in reindeer while ruminating often resemble those seen during non-REM sleep, a stage of sleep that organizes memories and repairs injuries.
The study suggests that this multitasking ability could be essential for reindeer, allowing them to get extra rest during the summer months without having to sleep longer hours.
Despite being more active during the summer, reindeer sleep the same amount throughout the year, suggesting their sleep requirements are regulated by the brain, not their environment.
Future research is needed to further understand this phenomenon and its implications for other ruminant animals.