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v d e Elements of nature
Ulimwengu	Space · Wakati · Matter · Nishati
Dunia	Sayansi za dunia · Future of the Earth · Geological history of Earth · Jiolojia · History of the Earth · Gandunia · Muundo wa dunia
Hali ya hewa	Angahewa · Climate · Metorolojia
Environment	Ecology · Ecosystem · Wilderness
Life	Biolojia · Eukaryota (Mmeas/Flora, Mnyamas/Fauna, Fungi, Protistaa) · Evolutionary history of life · Hierarchy of life · Life on Earth · Origin of life · Prokaryotes (Archaea, Bakteria) · Viruses
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