Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Donner, Blitzen, and yes, even Rudolph have evolved an excellent strategy to rest efficiently, a new study finds. Published today in the journal Current Biology, this paper by researchers in Switzerland and Norway gifts us a discovery about how rumination — the process of rechewing partially digested food called cud — rejuvenates reindeer.
