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Is there intelligent life on other planets?
Literal
Other [genitive-の] planets [at-に] intelligent-life-forms [topic-は] exist [question-か]?
A classic science-curiosity question. 知的生命体 ('intelligent life-form') is a specialized compound: 知的 (intellectual, intelligent) + 生命 (life) + 体 (body, form). Used in astrobiology and science-fiction contexts for 'intelligent life.' 惑星 ('planet') is the formal term; ピーターパン or casual contexts might use プラネット. The topic particle は on 知的生命体 contrasts it with an implicit 'what about microbes or non-intelligent life?' — focusing the question specifically on intelligence. The existential verb いる is used because life-forms are animate.