Chiphunzitso chopanda pake cha Dziko lapansi: Mkati mwathu kunja kwa chilengedwe
Zonse zidayamba mu 1970 pomwe bungwe la United States Environmental Science Service Administration (ESSA) lidasindikiza m'manyuzipepala zithunzi zina zojambulidwa ndi satellite ya ESSA-7 yofanana ndi North Pole.…