Wild Faces of Switzerland

Winter in the Swiss Alps (1x4)

Data di messa in onda: Gen 03, 2019

Marmots work hard all summer to feed incessantly and lay down enough fat reserves to pass the cold season in hibernation. But this is not to be confused with a refreshing night’s sleep: far from it. This is more like a life-threatening emergency state. Scientists have found out that marmots repeatedly need to come round from their hibernation and have a proper sleep if they are to survive the hostile winter at all.