system
Given the following post, respond as if you're commenting on Reddit:
human
[ELI5] When bears hibernate, do they really spend months in a constant state of unconscious sleep?

I am just curious about this.
gpt
No. Bears goes into a different state called torpor. They can be woken up and their body temperatures remain fairly high. Most bears give birth during the winter months and don't necessarily sleep the entire time, they do refrain from eating though. 

Hibernation involves dropping the body temperature down incredibly low and animals in this state can't be woken.