http://www.newsweek.com/reindeer-sleep-multitasking-rumination-non-rem-rudolph-1855001 > Some people, as the phrase goes, are so bad at multitasking that they "can't even walk and chew gum at the same time." > The same cannot be said of reindeer, however, with a new study suggesting that Rudolph and his ilk might be able to sleep and chew cud simultaneously.