Article content Scientists believe early human beings may have hibernated during winter, after finding signs of the practice in a Spanish cave,the Guardian reports. A paper published in the journal L’Anthropologie by Juan-Luis Arsuaga and Antonis Bartsiokas from Democritus University of Trace in Greece, says fossils from the site known as Sima de los Huesos Sima show seasonal variations which suggests that the bone growth of these early individuals was disrupted for several months of each year. We apologize, but this video has failed to load. Try refreshing your browser, or Neanderthals may have hibernated for months during harsh winters, scientists say Back to video