From one season to the next, changes are extreme in the Arctic, leading to major changes in reindeer activity and food consumption. Image: Leo Rescia Calories are needed to combat the cold, and the reindeer have to work so hard to store up energy for the winter that...
Elephant seals, whether northern or southern (as seen here in the photo), can sleep in only during the breeding season. Photo: Michael Wenger Anyone who has observed elephant seals on the beach can certainly confirm that they spend a lot of time sleeping. During their...
