Is it possible that there could be a type of pllant that grows deep deep under ground and can creat bio light

like deep sea fish could this plant give off light with meensn it has light to grow other types of plants and if theres a water source...what im basicly asking it possible some were under ground in a water filled cave...could there be a rainforest with new plants and animal not known by man?..mabye even there could be dinosaurs? that would be cool

Under world rain forest

possible look?

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