While you were rolling out of bed this morning, a video of a polar bear cub struggling to get back to sleep made its rounds on the internet.

The video may be relatable to those of us who know the feeling of tossing and turning in bed (and who doesn't know that feeling?), but the cub's struggle to fall asleep could be due to more disheartening reasons than him having too much caffeine before bed.

The bear in the clip is a 3- or 4-month old cub at Adventure World, a Japanese amusement park and zoo, according to the video's caption. And under normal circumstances in the wild, bedtime would look much different for this newborn cub.

"Until the age of about 4 months, [a bear cub would] be in a den, nursing with its mother," Susanne Miller, wildlife biologist at Alaska's Fish and Wildlife Service, told The Dodo.

Compared to a well-lit glass box, a den is a much darker environment for a cub to grow in.