Seudónimo
Seudónimo
21-09-2016
Physics
contestada
what is three sources of light
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Brooke13419
Brooke13419
21-09-2016
Sun and light bulb .........................
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IcySlim
IcySlim
21-09-2016
natural is sun, stars moon. Humans discovered fire, oil lamps, candles.
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