system
Given the following post, respond as if you're commenting on Reddit:
human
How is it that Han's Tauntaun, an animal indigenous to Hoth, froze to death after a day of walking?

Surely they've evolved to be able to withstand the conditions of their own planet right?
gpt
Tauntauns are well-suited to the harsh conditions of Hoth, but they're not invincible. They retreat into caves in the wild, or they're sheltered when they're in captivity, to allow their core body temperature to return to normal. If they go too long without doing this, they freeze to death.