A Huffington Post news report explores the similarities and differences between canine and human sleep.

 Dogs and humans have similar sleep cycles that include a mix of stage and REM sleep. Humans, however, normally experience four or five of these cycles consecutively through the night, while dogs can have 20 or more much shorter ones scattered throughout the night and day. Dogs doggedly get up and get down in a distinct sleep-wake rhythm known as segmented sleep.

View the full story at www.huffingtonpost.com