每日口說挑戰四十年的大謎團！看看科學家居然在實驗室中重現北極光？！ (Why Scientists Recreated the Northern Lights in a Lab)

For decades, the exact science of how the northern lights form in our night sky has eluded experts.

DAY 2557
For decades, the exact science of how the northern lights form in our night sky has eluded experts.