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পৃথিবীর ভেতরেই আছে বিপুল পানির উৎস! বিজ্ঞানীরা বলছেন সেই উৎসটি হতে পারে একটি আস্ত সাগর!
You might think that the depths of the ocean are the strangest place on Earth, and we would have agreed with you. Except that we just found out that there's almost certainly another ocean, a secret ocean, hiding right beneath our feet.